[教学]小数四则混合运算专项练习276题(有答案)ok

小数混合运算专项练习276题(有答案) (1) 0.11×1.8+8.2×0.11, (8) 1.56×1.7+0.44×1.7(2) 2.34×99+2.34, (9) 1.8×[(3.41,2.9)?0.03] (3) 5.4?2.7×0.8 (4) 132×101 (10) 0.125×32×2.5( (5) 6.25?1.25?0.8 (11) 1.258×18.5,0.258×18.5 (6) 2.5×16( (7) 6.33×101,6.33 (12) 8.48?0.8×0.9 (13) 1.25×2.4 (14) 5.85?(1.3+0.5)×6( (21) 1.36+4.85+2.64+6.15 (15) 17.17,6.8,3.2,6.17 (16) 5.4×[(1.3+2.15)?0.2] (22) 98.5?2.5?4 (23) 5.4?[2.5×(3.7,2.9)] (17) 8.4?0.6+8.4?0.4(24) 0.8×(4,3.68)?0.01 (18) 16.8×10.1 (19) 10.9,0.9?0.2+1.8 (25) 83.7,12.83,0.17 (20) 1.25×3.2×0.25( (26) 5.96+13×(3.2,3.12) (27) 4.32?2.4×1.7; (35) 2.74×9.5+5×0.274 (28) 16.2×4.5+3.8×4.5; (36) 0.36+9.6?3.2( (29) 9.05,3.86,3.14; (37) 3.75×25+6.25×25 (30) 7.28+0.72?0.9 (38) 25.46,8.23,1.76 (39) 2.9+7.1×10 (31) 4.32+5.43+6.68 (32) 17.17,6.8,3.2 (40) 1.25×32×0.25( (33) 5.29×9+5.29 (41) 15.68,(7.78,4.32),2.32 (34) 16.8×10.1 (42) 0.25×3.2×1.25 (50) 125×3.2×2.5 (43) 9.99×1.01 (51) 3.6×10.1 (44) 4.63×1.4+46.3×0.86 (52) 5.8×2.7+0.58×73 (45) 17.5?0.8?12.5 (53) 3.6+6.4×1.8 (46) 0.9+9.9+99.9+999.9((54) (1.48+3.02)?(3.6×0.5) (47) 2.9×99+2.9 (48) 25×11.2×4 (55) (36.7,4.9)×101,31.8( (49) 23.25,6.75,3.25( (56) 6.33×101,6.33 (64) 0.125×32×2.5 (57) 35.6,5×1.73 (65) 0.8×6.3,0.8×3.8 (58) 1.6×55.4,55.4×0.6 (66) 504?3.2×2.08 (59) 17.68?5.2+2.7×1.5( (67) (20,0.8×9)×5.7 (60) 1.08×0.8?0.27(68) 2.4×1.5+3.6?1.5 (61) 102×0.45 (69) 7.38,5.14+3.62,2.86 (62) 22.78?1.25?0.8 (70) 0.12×1.8+8.2×0.12 (63) 0.34×101,0.34( (71) 5.4?[0.51?(1.2,1.03)] (72) [(8.1,5.6)×0.9,1.05]?0.04((78) (294.4,19.2×6)?(6+8) (73) 10.8,0.8?(0.35+0.05) (79) 12.5×0.76×0.4×8×2.5( (74) 8×[1?(2.3,2.25)] (80) 4.98+8.02×2.5 (75) 2.64×9.9+0.264 (81) 60.8,40.8?2.5 (76) 4.52+0.61+1.39+6.48 (82) 0.8×69.6×12.5 (83) 4.98×99+4.9 (77) 4.27,(1.96,1.73) (84) 6.48?3.2?2.5 (85) 1.2×7.6+7.6×6.8( (92) 7.4×9.9 (86) (9.4,5.8)×2.07 (93) 3.84,2.7×0.64 (87) 12.54,4.56,3.44,1.54 (94) 8.68,8.68?0.56×0.5 (88) (9.36×5+9.36+9.36×2)×1.25 (95) 4.7×4.7+4.7+4.3×4.7( (96) 2.72?[(8.2,6.5)×0.5]; (89) 7.236?0.18,14.3×0.02( (90) 9.6?0.4×0.25 (97) 9.12+9.12×9,60.2; (91) 29.7?(5.85?0.65) (98) 28.4?0.4?0.25; (99) 27.36,27.36?7.6( (107) 4.38,1.56+0.62,0.44 (100) 3.25×0.45+6.75×0.45 (108) 0.4×270×2( (101) 31.5,24.5?3.5 (109) (40+1.25)×8 (102) 7.5×102 (110) (12.5,0.05)×8 (103) 6.3+3.7×2.8((111) 2.6×8.5+8.5×7.4 (112) 9.9×6.9,6.9×3.9 (104) 2.15+8.73+1.27+7.85 (105) 11.87,(8.2+1.87) (113) 5.6×99+5.6 (106) 5.42,3.87,1.13 (114) 2.5×(1.9+1.9+1.9+1.9) (115) 7.2?1.25?8( (123) (1.3+1.3×0.125×8)?(80,77.4) (116) 52.4,(15+0.6)?1.6 (117) 9.87×99+9.87 (124) 4×(25+2.5+0.25)?111 (118) 46.8?0.9?0.4 (125) 6.25?〔(17.2,3.6×4.5)?0.32〕 (119) 5.5×17.3+6.7×5.5( (120) 99×4.2+4.2 (126) 28.4×99+28.4 (121) 0.25×1.25×3.2 (127) 0.94×2.5,0.45 (122) 6.4×14+15×6.4+6.4 (128) 4×0.8×12.5×2.5 (129) 17.5?0.25×17+13( (136) 7.575?[(5.63,1.88)×0.2]( (130) 10.1×87 (131) 2.3+3.19?(22,19.8) (137) 7.5,(5.5+1.24) (132) 1.25×7.2( (138) 0.26+15.68+9.74+2.32 (133) 9.1,1.2?6,6.24 (139) 13.26+9.55,3.26 (134) 7.3+12.8,3.8×2.3 (140) 6.1+3.9,6.1+3.9( (135) (5.36+7.64)?13×100 (141) 31.7?0.63(保留2位小数) (142) 2.4×1.5+3.6?1.5 (147) 21.35,3.25,16.75 (143) 0.32×0.25+0.08?4 (148) 33.02,(148.4,90.85)?2.5 (144) (9.6+1.48?3.7)?8 (145) 5.8?[4×(1.34,0.14)](149) 32×2.5×0.125 (146) 5.4?[0.51?(1.2,1.03)]( (150) 18.1+(3,0.299?0.23)×1( (151) 67,(2.98+0.67) (159) 0.75×1.8?1.5 (152) 8×16,73.8×6 (160) 12.5×7.1×0.8 (153) (45+14)?73+710( (161) 6.12×99+6.12 (154) 13.7×0.125×8 (162) 8.6?0.86+8×0.35 (155) 0.8×[13,(3.12+5.28)](163) 5.6×(18.5,8.5?0.5) (156) 102×0.56 (157) 1.53×1.7+0.47×1.7( (164) 0.125×4.78×80 (158) 5.18+0.73+0.82 (165) 2.8×3.6+1.4×2.8 (166) (0.4+40)×2.5 (174) 0.74+0.9×7.4= (167) 78.7,17.7×3.6 (175) 7.8?0.125?0.8= (168) 18?[0.3×(8,6.5)] (176) 37.5?[0.3×(1.34,0.84)] (169) 12.7+12.5+0.5( (170) 91?2.6?0.05= (177) (2.5+27.75?1.5)×1.6( (171) 6.3×3.7+6.3×6.3= (178) 6.21,3.8+2.2 (172) (3.7+1.7×0.4)?2.5= (179) 6.03+3.7+2.97 (173) 7.28+3.2?2.5= (180) 17.43,6.57,2.43 (181) 20.47,(1.47+6.8) (189) 8.4?0.21?0.5( (182) 13.26+4.71+3.47+5.29 (183) 22.74+8.68,13.74( (190) 0.125×9×8×0.3 (184) 10?0.2?2.5 (191) 4.62?5?0.66 (185) 64×4.5+3.6×45 (192) 5.78×2.3+5.78+5.78×6.7 (186) 1.25×3.2×0.8 (193) 7.75×[20?(3.24,3.04)]( (187) 14.5×102 (188) 14.64+3.7×2.8 (194) 1.25×0.5×8×0.2 (195) 0.97×9+0.97 (201) 0.25×3.85×40 (196) 5.4?[3×,3.8,2.9,]( (197) 0.4×(3.2,0.8)?0.15 (202) 1.46×3.5+3.5×4.54( (203) 7×12.5×0.8 (198) 5.7+1.9×0.2?7.6(204) 4.7×3.6+4.7×6.4 (199) 32.4×6.3+32.4×3.7 (205) 1.45×[(2.8+4.4)?2.4]( (200) 18.2,10.6×(0.9,0.75) (206) 4.2×(6.18,3.03)+6.3 (211) 3.08×3.5+6.2×3.08+3.08×0.3( (207) 15.02,6.8,(1.02+1.2 ) (212) 2.3+3.91?(22,19.7) (213) 21.6?[64.8,(48.6,2.7×2)]( (208) 0.6×[(5,0.68)?1.2] (209) 2.7?4+6.3×0.25 (214) 93.6×3.6+1.4×3.6 (210) (6.02+2.8 )?0.4,2.05 (215) 0.25×0.8×0.125×0.4 (216) 2.7×1.5,2.7 (217) 9.08+5.45+11.92+4.55 (224) 6.6?〔14.5,(1.7+1.8)〕 (218) 1.25×30×1.2×0.8( (225) 0.25×9.87×4 (219) 0.6+0.94,0.208 (226) 36.7×2.1+10.8 (220) 4.85×1.25×8 (227) 8.45,0.45×0.1 (221) (64,22.4?1.4)×1.2 (228) 0.73×102 (222) 18.3,6.25,3.75 (229) 7.8×5.6+2.3×4.4 (223) 2.8×3.6+1.4×2.8 (230) 76.3×27,76.3×17( (231) 7.05×23.7+7.05×76.3( (237) 1.08?1.8×1.2 (232) [(7.6,5.2)?0.4+2.54]×32((238) 50.4×1.9,1.8 (239) 0.82×0.25+1.18×0.25( (233) 17.68?5.2+2.7×1.5 (240) 8.5×[(2.36+2.42)?0.25] (234) 35.6,5×1.73 (241) 3.9?[(1.3+0.6)×6,3.6] (235) (1.1,0.78)×(2.7,1.95) (242) 4.25×6.3+3.7×4.25 (243) 205×0.99 (236) 1.3×0.75×4 (244) 25.6,7.49,2.51 (245) [2.5,(6.8,4.9)]×0.8( (253) 132.4,59.8= (246) 102×4.5 (254) 6.62×0.84= (247) 3.4?[(1.2+0.5)×5] (255) 2.07?0.023= (248) 8×(20,1.25) (256) [20.026,(8.6+9.7)×0.92]?30.19( (249) 0.654+10.9×6.5 (250) 22.7×1.25×0.8 (257) 0.125×32×2.5 (251) 3.91×2.8+6.09×2.8( (258) 0.8×6.3,0.8×3.8 (259) 50.4?3.2×2.08 (252) 6.23+3.09= (260) 204?(3.4×0.5) (266) 12.5×2.4( (261) (43.26+2.34)?7.5 (267) 38.78,19.59+41.22,30.41 (262) (20,0.8×9)×5.7( (263) 13.25,0.8+1.75,1.2; (268) 2.74×4.86+4.86×6.26+4.86 (264) 2.5×99+2.5; (269) 0.08×(12.5+2.5)×0.1 (265) 10.36+4.8,16.5?5; (270) 25.92+(10.1,14.5×0.2) (271) 0.487×12.5?48.7 (275) 0.25×2010+20.10×75 (276) 30.8?[(6.34,4.59)×4]( (272) (8.16+2.09)?[(10.3,9.3)?0.4]( (273) 1.56×1.7+0.44×1.7 (274) 12.5×(7.2,1.9)×0.8 参考答案: =3.4; (1)0.11×1.8+8.2×0.11， (9)1.8×[(3.41,2.9)?0.03]， =0.11×(1.8+8.2)， =1.8×[0.51?0.03]， =0.11×10， =1.8×17， =1.1; =30.6; (2)2.34×99+2.34， (10)0.125×32×2.5， =2.34×(99+1)，=(0.125×8)×(4×2.5)， =2.34×100， =1×10， =234; =10 (3)5.4?2.7×0.8， (11)1.258×18.5,0.258×18.5， =2×0.8， =18.5×(1.258,0.258)， =1.6; =18.5×1， (4)132×101， =18.5; =132×(100+1)， (12)8.48?0.8×0.9， =132×100+132，=10.6×0.9， =13332; =9.54; (5)6.25?1.25?0.8， (13)1.25×2.4， =6.25?(1.25×0.8)，=1.25×8×0.3， =6.25?1， =10×0.3， =6.25; =3; (6)2.5×16， (14)5.85?(1.3+0.5)×6， =(2.5×4)×4， =5.85?1.8×6， =40 =3.25×6， (7)6.33×101,6.33， =19.5 =6.33×(101,1)，(15)17.17,6.8,3.2,6.17 =6.33×100， =(17.17,6.17),(6.8+3.2)， =633; =11,10， (8)1.56×1.7+0.44×1.7， =1; =1.7×(1.56+0.44)， (16)5.4×[(1.3+2.15)?0.2] =1.7×2， =5.4×[3.45?0.2]， =5.4×17.25， =9.05,7， =93.15; =2.05; (17)8.4?0.6+8.4?0.4 (30)7.28+0.72?0.9， =14+21 =7.28+0.8， =35; =8.08 (18)16.8×10.1 (31)4.32+5.43+6.68， =16.8×10+16.8×0.1， =4.32+6.68+5.43， =168+1.68， =11+5.43， =169.68; =16.43; (19)10.9,0.9?0.2+1.8 (32)17.17,6.8,3.2， =10.9,4.5+1.8， =17.17,(6.8+3.2)， =8.2; =17.17,10， (20)1.25×3.2×0.25 =7.17; =(1.25×0.8)×(4×0.25)， (33)5.29×9+5.29， =1×1， =5.29×(9+1)， =1 =5.29×10， (21)1.36+4.85+2.64+6.15， =52.9; =(1.36+2.64)+(4.85+6.15)， (34)16.8×10.1， =4+11， =16.8×10+16.8×0.1， =15; =168+1.68， (22)98.5?2.5?4， =169.68; =98.5?(2.5×4)， (35)2.74×9.5+5×0.274， =98.5?10， =2.74×9.5+0.5×2.74， =9.85; =2.74×(9.5+0.5)， (23)5.4?[2.5×(3.7,2.9)]， =2.74×10， =5.4?[2.5×0.8]，=27.4; =5.4?2， (36)0.36+9.6?3.2， =2.7; =0.36+3， (24)0.8×(4,3.68)?0.01， =3.36 =0.8×0.32?0.01， (37)3.75×25+6.25×25， =0.256?0.01， =25×(3.75+6.25)， =25.6; =25×10， (25)83.7,12.83,0.17， =250; =83.7,(12.83+0.17)，(38)25.46,8.23,1.76， =83.7,13， =25.46,(8.23+1.76)， =70.7; =25.46,9.99 (26)5.96+13×(3.2,3.12)，=15.45; =5.96+13×0.08， (39)2.9+7.1×10， =5.96+1.04， =2.9+71， =7( =73.9; (27)4.32?2.4×1.7， (40)1.25×32×0.25 =1.8×1.7， =(1.25×8)×(4×0.25)， =3.06; =10×1， (28)16.2×4.5+3.8×4.5，=1( =(16.2+3.8)×4.5， (41)15.68,(7.78,4.32),2.32， =20×4.5， =90; =15.68,7.78+4.32,2.32， (29)9.05,3.86,3.14， =(15.68+4.32),(7.78+2.32)， =9.05,(3.86+3.14)， =20,10， =10; =5.8×2.7+5.8×7.3， (42)0.25×3.2×1.25， =5.8×(2.7+7.3)， =0.25×4×0.8×1.25， =5.8×10， =(0.25×4)×(0.8×1.25)， =58; =1×1， (53)3.6+6.4×1.8， =1; =3.6+11.52， (43)9.99×1.01， =15.12; =(10,0.01)×1.01， (54)(1.48+3.02)?(3.6×0.5)， =10.1,0.0101， =4.5?1.8， =10.0899; =2.5; (44)4.63×1.4+46.3×0.86， (55)(36.7,4.9)×101,31.8， =46.3×0.14+46.3×0.86， =31.8×101,31.8， =46.3×(0.14+0.86)， =31.8×(101,1)， =46.3×1， =31.8×100， =46.3; =3180 (45)17.5?0.8?12.5， (56)6.33×101,6.33 =17.5?(0.8×12.5)， =6.33×(101,1)， =17.5?1， =6.33×100， =17.5; =633; (46)0.9+9.9+99.9+999.9， (57)35.6,5×1.73， =1,0.1+10,0.1+100,0.1+1000,0.1，=35.6,8.65， =26.95; =(1+10+100+1000),(0.1+0.1+0.1+0.1)，(58)1.6×55.4,55.4×0.6， =55.4×(1.6,0.6)， =1111,0.4， =55.4×1， =1110.6=55.4; (47)2.9×99+2.9 (59)17.68?5.2+2.7×1.5， =(99+1)×2.9， =3.4+4.05， =100×2.9， =7.45 =290; (60)1.08×0.8?0.27 (48)25×11.2×4 =1.08?0.27×0.8， =25×4×11.2， =4×0.8， =100×11.2， =3.2; =1120;(61)102×0.45 (49)23.25,6.75,3.25 =(100+2)×0.45， =23.25,(6.75+3.25)， =100×0.45+2×0.45， =23.25,10，=45+0.9， =13.25 =45.9; (50)125×3.2×2.5， (62)22.78?1.25?0.8 =125×8×0.4×2.5， =22.78?(1.25×0.8)， =(125×8)×(0.4×2.5)， =22.78?1， =1000×1， =22.78; =1000; (63)0.34×101,0.34 (51)3.6×10.1，=(101,1)×0.34， =3.6×(10+0.1)， =100×0.34， =3.6×10+3.6×0.1， =34 =36+0.36， (64)0.125×32×2.5， =36.36; =(0.125×8)×(4×2.5)， (52)5.8×2.7+0.58×73， =1×10， =10; =(4.52+6.48)+(0.61+1.39)， (65)0.8×6.3,0.8×3.8， =11+2， =0.8×(6.3,3.8)， =13; =0.8×2.5， (77)4.27,(1.96,1.73) =2; =4.27,0.23， (66)504?3.2×2.08， =4.04; =157.5×2.08， (78)(294.4,19.2×6)?(6+8) =327.6; =(294.4,115.2)?14， (67)(20,0.8×9)×5.7， =179.2?14， =(20,7.2)×5.7， =12.8; =12.8×5.7， (79)12.5×0.76×0.4×8×2.5 =72.96 =(12.5×8)×(0.4×2.5)×0.76， (68)2.4×1.5+3.6?1.5， =3.6+2.4， =100×1×0.76， =6; =76( (69)7.38,5.14+3.62,2.86， (80)4.98+8.02×2.5， =(7.38+3.62),(5.14+2.86)， =4.98+20.25， =11,8， =25.03; =3; (81)60.8,40.8?2.5， (70)0.12×1.8+8.2×0.12， =60.8,16.32， =0.12×(1.8+8.2)， =44.48; =0.12×10， (82)0.8×69.6×12.5， =1.2; =(0.8×12.5)×69.6， (71)5.4?[0.51?(1.2,1.03)]，=10×69.6， =696; =5.4?[0.51?0.17]，(83)4.98×99+4.9， =5.4?3， =493.02+4.9， =1.8; =497.92; (72)[(8.1,5.6)×0.9,1.05]?0.04，(84)6.48?3.2?2.5， =6.48?(3.2×2.5)， =[2.5×0.9,1.05]?0.04， =6.48?8， =[2.25,1.05]?0.04， =0.81; =1.2?0.04， (85)1.2×7.6+7.6×6.8， =30=7.6×(1.2+6.8)， (73)10.8,0.8?(0.35+0.05)， =7.6×8， =10.8,0.8?0.4， =60.8 =10.8,2，(86)(9.4,5.8)×2.07， =8.8; =3.6×2.07， (74)8×[1?(2.3,2.25)]， =7.452; =8×[1?0.05]， (87)12.54,4.56,3.44,1.54， =8×20， =(12.54,1.54),(4.56+3.44)， =160; =11,8， =3; (75)2.64×9.9+0.264， (88)(9.36×5+9.36+9.36×2)×1.25，=0.264×99+0.264， =0.264×(99+1)， =9.36×(5+2+1)×1.25， =0.264×100， =9.36×8×1.25， =26.4; =9.36×(8×1.25)， (76)4.52+0.61+1.39+6.48 =93.6; (89)7.236?0.18,14.3×0.02， =24.5; =40.2,0.286， (102)7.5×102， =39.914( =7.5×(100+2)， (90)9.6?0.4×0.25， =7.5×100+7.5×2， =24×0.25， =750+15， =6; =765; (91)29.7?(5.85?0.65)， (103)6.3+3.7×2.8， =29.7?9， =6.3+10.36， =3.3; =16.66( (92)7.4×9.9， (104)2.15+8.73+1.27+7.85 =7.4×(10,0.1)， =(2.15+7.85)+(8.73+1.27)， =7.4×10,7.4×0.1， =10+10， =74,0.74， =20; =73.26; (105)11.87,(8.2+1.87)， (93)3.84,2.7×0.64， =11.87,1.87,8.2， =3.84,1.728， =10,8.2， =2.112; =1.8; (94)8.68,8.68?0.56×0.5， (106)5.42,3.87,1.13， =8.68,15.5×0.5， =5.42,5， =8.68,7.75， =0.42; =0.93; (107)4.38,1.56+0.62,0.44， (95)4.7×4.7+4.7+4.3×4.7， =(4.38+0.62),(1.56+0.44)， =4.7×(4.7+4.3+1)， =5,2， =4.7×10， =3; =47 (108)0.4×270×2.5， (96)2.72?[(8.2,6.5)×0.5]=(0.4×2.5)×270， =2.72?[1.7×0.5]， =270; =2.72?0.85， (109)(40+1.25)×8， =3.2; =40×8+1.25×8， (97)9.12+9.12×9,60.2 =320+10， =(1+9)×9.12,60.2， =330; =10×9.12,60.2， (110)(12.5,0.05)×8， =91.2,60.2， =12.5×8,0.05×8， =31;=100,0.4， (98)28.4?0.4?0.25 =99.6; =28.4?(0.4×0.25)， (111)2.6×8.5+8.5×7.4， =28.4?0.1，=(2.6+7.4)×8.5， =284; =85; (99)27.36,27.36?7.6 (112)9.9×6.9,6.9×3.9， =27.6,3.6， =(9.9,3.9)×6.9， =24 =6×6.9， =41.4; (113)5.6×99+5.6， (100)3.25×0.45+6.75×0.45，=5.6×(99+1)， =0.45×(3.25+6.75)， =560; =0.45×10， (114)2.5×(1.9+1.9+1.9+1.9)， =4.5; =2.5×4×1.9， (101)31.5,24.5?3.5， =10×1.9， =31.5,7， =19; (115)7.2?1.25?8， =28.4×(99+1)， =7.2?8?1.25， =28.4×100， =0.9?1.25， =2840( =0.72( (127)0.94×2.5,0.45， (116)52.4,(15+0.6)?1.6， =2.35,0.45， =52.4,15.6?1.6， =1.9( =52.4,9.75， (128)4×0.8×12.5×2.5， =42.65; =(4×2.5)×(0.8×12.5)， (117)9.87×99+9.87， =10×10， =9.87×(99+1)， =100( =987; (129)17.5?0.25×17+13， (118)46.8?0.9?0.4， =70×17+13， =46.8?(0.9×0.4)， =1190+13， =46.8?0.36， =1203 =130; (130)10.1×87， (119)5.5×17.3+6.7×5.5， =(10+0.1)×87， =5.5×(17.3+6.7)， =87+8.7， =5.5×24， =95.7; =132 (131)2.3+3.19?(22,19.8)， (120)99×4.2+4.2 =2.3+3.19?2.2， =4.2×(99+1)， =2.3+1.45， =4.2×100， =3.75; =420; (132)1.25×7.2， (121)0.25×1.25×3.2 =1.25×8×0.9， =0.25×1.25×(4×0.8)， =10×0.9， =0.25×4×(1.25×0.8)，=9 =1×1， (133)9.1,1.2?6,6.24 =1; =9.1,0.2,6.24， (122)6.4×14+15×6.4+6.4 =8.9,6.24， =6.4×(14+15+1)， =2.66; =6.4×30， (134)7.3+12.8,3.8×2.3 =192; =20.1,8.74， (123)(1.3+1.3×0.125×8)?(80,77.4)=11.36; (135)(5.36+7.64)?13×100 =(1.3+1.3×1)?2.6， =13?13×100， =2.6?2.6， =100; =1;(136)7.575?[(5.63,1.88)×0.2] (124)4×(25+2.5+0.25)?111 =(4×25+4×2.5+4×0.25)?111， =7.575?[3.75×0.2]， =(100+10+1)?111， =7.575?0.75， =111?111， =10.1 =1; (137)7.5,(5.5+1.24)， (125)6.25?[(17.2,3.6×4.5)?0.32]=7.5,5.5,1.24， =2,1.24， =6.25?[(17.2,16.2)?0.32]， =0.76; =6.25?(1?0.32)， =6.25?3.125， (138)0.26+15.68+9.74+2.32， =2 =(0.26+9.74)+(15.68+2.32)， (126)28.4×99+28.4， =10+18， =28; =19.8 (139)13.26+9.55,3.26， (151)67,(2.98+0.67)， =13.26,3.26+9.55， =67,3.65， =10+9.55， =63.35; =19.55; (152)8×16,73.8×6， (140)6.1+3.9,6.1+3.9， =128+442.8， =6.1,6.1+(3.9+3.9)， =570.8; =0+7.8， (153)(45+14)?73+710， =7.8 =59?73+710， (141)31.7?0.63?50.32; =+710， (142)2.4×1.5+3.6?1.5 =3.6+2.4， =710 =6; (143)0.32×0.25+0.08?4 (154)13.7×0.125×8， =0.08+0.08?4， =13.7×(0.125×8)， =0.08+0.02， =13.7×1， =0.08+0.02， =13.7; =0.1; (155)0.8×[13,(3.12+5.28)]， (144)(9.6+1.48?3.7)?8 =0.8×[13,8.4]， =(9.6+0.4)?8， =0.8×4.6， =10?8， =3.68; =1.25; (156)102×0.56， (145)5.8?[4×(1.34,0.14)] =(100+2)×0.56， =5.8?[4×1.2]， =100×0.56+2×0.56， =5.8?4.8， =56+1.12， ?1.21;=57.12; (146)5.4?[0.51?(1.2,1.03)] (157)1.53×1.7+0.47×1.7， =5.4?[0.51?0.17]， =(1.53+0.47)×1.7， =5.4?3， =2×1.7， =1.8 =3.4 (147)21.35,3.25,16.75， (158)5.18+0.73+0.82，( =21.35,(3.25+16.75)， =(5.18+0.82)+0.73， =21.35,20， =6+0.73， =1.35;=6.73; (148)33.02,(148.4,90.85)?2.5，(159)0.75×1.8?1.5， =1.35?1.5， =33.02,57.55?2.5，=0.9; =33.02,23.02， (160)12.5×7.1×0.8， =10; =(12.5×0.8)×7.1， (149)32×2.5×0.125， =10×7.1， =4×8×2.5×0.125， =71; =(4×2.5)×(8×0.125)， (160)6.12×99+6.12， =10×1， =6.12×(99+1)， =10;=6.12×100， (150)18.1+(3,0.299?0.23)×1，=612; (162)8.6?0.86+8×0.35， =18.1+(3,1.3)×1， =10+2.8， =18.1+1.7×1， =12.8; =18.1+1.7， (163)5.6×(18.5,8.5?0.5)， =5.6×(18.5,17)， =78 =5.6×1.5， (176)37.5?[0.3×(1.34,0.84)]， =8.4 (164)0.125×4.78×80， =37.5?[0.3×0.5]， =0.125×4.78×8×10， =37.5?0.15， =(0.125×8)×(4.78×10)， =250; =1×47.8， (177)(2.5+27.75?1.5)×1.6， =47.8; =(2.5+18.5)×1.6， (165)2.8×3.6+1.4×2.8， =21×1.6， =2.8×(3.6+1.4)， =33.6 =2.8×5， (178)6.21,3.8+2.2， =14; =2.41+2.2， (166)(0.4+40)×2.5， =4.61; =0.4×2.5+40×2.5， (179)6.03+3.7+2.97， =1+100， =(6.03+2.97)+3.7， =101; =9+3.7， (167)78.7,17.7×3.6， =12.7; =78.7,63.72， (180)17.43,6.57,2.43， =14.98; =17.43,(6.57+2.43)， (168)18?[0.3×(8,6.5)]， =17.43,9， =18?[0.3×1.5]， =8.43; =18?0.45， (181)20.47,(1.47+6.8)， =40; =20.47,1.47,6.8， =19,6.8， (169)12.7+12.5+0.5， =12.2; =12.7+(12.5+0.5)，(182)13.26+4.71+3.47+5.29， =12.7+13， =(13.26+3.47)+(4.71+5.29)， =25.7 =16.73+10， (170)91?2.6?0.05， =26.73; =35?0.05， (183)22.74+8.68,13.74， =700; =(22.74,13.74)+8.68， (171)6.3×3.7+6.3×6.3， =9+8.68， =6.3×(3.7+6.3)， =17.68 =6.3×10，(184)10?0.2?2.5， =63; =10?(0.2×2.5)， (172)(3.7+1.7×0.4)?2.5， =10?0.5， =(3.7+0.68)?2.5，=20; =4.38?2.5， (185)64×4.5+3.6×45， =1.752; =6.4×45+3.6×45， (173)7.28+3.2?2.5， =(6.4+3.6)×45， =7.28+1.28， =10×45， =8.56; =450; (174)0.74+0.9×7.4， (186)1.25×3.2×0.8， =(1+9)×0.74，=(1.25×0.8)×3.2， =10×0.74， =1×3.2， =7.4; =3.2; (175)7.8?0.125?0.8， (187)14.5×102， =7.8?(0.125×0.8)， =14.5×(100+2)， =7.8?0.1， =14.5×100+14.5×2， =1450+29， (200)18.2,10.6×(0.9,0.75)， =1479; =18.2,10.6×0.15， (188)14.64+3.7×2.8， =18.2,1.59， =14.64+10.36， =16.61; =25; (201)0.25×3.85×40， (189)8.4?0.21?0.5， =0.25×40×3.85， =40?0.5， =10×3.85， =80 =38.5; (190)0.125×9×8×0.3， (202)1.46×3.5+3.5×4.54， =(0.125×8)×(9×8)， =3.5×(1.46+4.54)， =1×72， =3.5×6， =72; =21 (191)4.62?5?0.66， (203)7×12.5×0.8， =4.62?(5×0.66)， =7×(12.5×0.8)， =4.62?3.3， =7×10， =1.4; =70; (192)5.78×2.3+5.78+5.78×6.7， (204)4.7×3.6+4.7×6.4， =5.78×(2.3+1+6.7)， =4.7×(3.6+6.4)， =5.78×10， =4.7×10， =57.8; =47; (193)7.75×[20?(3.24,3.04)]，(205)1.45×[(2.8+4.4)?2.4]， =1.45×[7.2?2.4]， =7.75×[20?0.2]， =1.45×3， =7.75×100， =4.35 =775 (206)4.2×(6.18,3.03)+6.3， (194)1.25×0.5×8×0.2，=4.2×3.15+6.3， =(1.25×8)×(0.5×0.2)， =13.23+6.3， =10×0.1， =19.53; =1; (207)15.02,6.8,(1.02+1.2 )， (195)0.97×9+0.97， =15.02,6.8,1.02,1.2， =0.97×(9+1)， =(15.02,1.02),(6.8+1.2)， =0.97×10， =14,8， =9.7; =6; (196)5.4?[3×,3.8,2.9,]，(208)0.6×[(5,0.68)?1.2]， =5.4?[3×0.9]， =0.6×[4.32?1.2]， =5.4?2.7， =0.6×3.6， =2 =2.16; (197)0.4×(3.2,0.8)?0.15， (209)2.7?4+6.3×0.25， =0.4×2.4?0.15， =2.7×0.25+6.3×0.25， =0.96?0.15， =(2.7+6.3)×0.25， =6.4; =9×0.25， (198)5.7+1.9×0.2?7.6， =2.25; =5.7+0.38?7.6， (210)(6.02+2.8 )?0.4,2.05， =5.7+0.05，=8.82?0.4,2.05， =5.75; =22.05,2.05， (199)32.4×6.3+32.4×3.7， =20; =32.4×(6.3+3.7)， (211)3.08×3.5+6.2×3.08+3.08×0.3， =32.4×10， =324; =(3.5+6.2+0.3)×3.08， =10×3.08， =18.3,10， =30.8 =8.3; (212)2.3+3.91?(22,19.7)， (223)2.8×3.6+1.4×2.8， =2.3+3.91?2.3， =2.8×(3.6+1.4)， =2.3+1.7， =2.8×5， =4; =14; (213)21.6?[64.8,(48.6,2.7×2)]，(224)6.6?[14.5,(1.7+1.8)]， =6.6?[14.5,3.5]， =21.6?[64.8,(48.6,5.4)]， =6.6?11， =21.6?[64.8,43.2]， =0.6 =21.6?21.6， (225)0.25×9.87×4， =1 =0.25×4×9.87， (214)93.6×3.6+1.4×3.6， =1×9.87， =(93.6+1.4)×3.6， =9.87; =95×3.6， (226)7×2.1+10.8， =(100,5)×3.6， =77.07+10.8， =100×3.6,5×3.6， =87.87; =360,18， (227)8.45,0.45×0.1， =342; =8.45,0.045， (215)0.25×0.8×0.125×0.4， =8.405; =(0.25×0.4)×(0.8×0.125)， (228)0.73×102， =0.1×0.1， =0.73×(100+2)， =0.01; =0.73×100+0.73×2， =73+1.46， (216)2.7×1.5,2.7， =74.46; =2.7×(1.5,1)，(229)7.8×5.6+2.3×4.4， =2.7×0.5， =43.68+10.12， =1.35; =53.8; (217)9.08+5.45+11.92+4.55， (230)76.3×27,76.3×17 =(9.08+11.92)+(5.45+4.55)， =76.3×(27,17)， =21+10， =76.3×10， =31; =763( (218)1.25×30×1.2×0.8， (231)7.05×23.7+7.05×76.3 =(1.25×0.8)×(30×1.2)，=(23.7+76.3)×7.05， =1×36， =100×7.05， =36 =705 (219)0.6+0.94,0.208，(232)[(7.6,5.2)?0.4+2.54]×32， =1.54,0.208， =1.332; =[2.4?0.4+2.54]×32， (220)4.85×1.25×8， =[6+2.54]×32， =4.85×(1.25×8)， =8.54×32， =4.85×10， =273.28 =48.5; (233)17.68?5.2+2.7×1.5， (221)(64,22.4?1.4)×1.2，=3.4+4.05， =(64,16)×1.2， =7.45; =48×1.2， (234)35.6,5×1.73， =57.6; =35.6,8.65， (222)18.3,6.25,3.75， =26.95; =18.3,(6.25+3.75)， (235)(1.1,0.78)×(2.7,1.95)，=(100+2)×4.5， =100×4.5+2×4.5， =0.32×0.75， =450+9， =0.24 =459; (236)1.3×0.75×4， (247)3.4?[(1.2+0.5)×5]， =1.3×3×0.25×4， =3.4?[1.7×5]， =1.3×3×(0.25×4)， =3.4?8.5， =3.9×1， =0.4; =3.9; (248)8×(20,1.25)， (237)1.08?1.8×1.2， =8×20,8×1.25， =0.6×1.2， =160,10， =0.72; =150; (238)50.4×1.9,1.8， (249)0.654+10.9×6.5， =95.76,1.8， =0.654+70.85， =93.96; =71.504; (239)0.82×0.25+1.18×0.25， (250)22.7×1.25×0.8， =(0.82+1.18)×0.25， =22.7×(1.25×0.8)， =2×0.25， =22.7×1， =0.5 =22.7; (240)8.5×[(2.36+2.42)?0.25]，(251)3.91×2.8+6.09×2.8， =(3.91+6.09)×2.8， =8.5×[4.78?0.25]， =10×2.8， =8.5×19.12， =28 =162.52; (252)6.23+3.09=9.32， 6.23 (241)3.9?[(1.3+0.6)×6,3.6]，; =3.9?[1.3×0.6+0.6×6,3.6]， =3.9?[0.78+3.6,3.6]， (253)132.4,59.8=72.6; =3.9?0.78， 132.4 =5; ; (242)4.25×6.3+3.7×4.25， =4.25×(6.3+3.7)， (254)6.62×0.84=5.5608; =4.25×10， 6.62 =42.5; (243)205×0.99， =205×(1,0.01)， ; =205×1,205×0.01， =205,2.05， =202.95; (255)2.07?0.023=90; (244)25.6,7.49,2.51， =25.6,(7.49+2.51)， =25.6,10， =15.6; (245)[2.5,(6.8,4.9)]×0.8， =[2.5,1.9]×0.8， (256)[20.026,(8.6+9.7)×0.92]?30.19， =0.6×0.8， =0.48 =[20.026,18.3×0.92]?30.19， (246)102×4.5， =[20.026,16.836]?30.19， =3.19?30.19， =80,50， =30; =( (268)2.74×4.86+4.86×6.26+4.86， (257)0.125×32×2.5， =(2.74+6.26+1)×4.86， =0.125×8×4×2.5， =10×4.86， =(0.125×8)×(4×2.5)， =48.6; =1×10， (269)0.08×(12.5+2.5)×0.1， =10; =(0.08×12.5+0.08×2.5)×0.1， (258)0.8×6.3,0.8×3.8， =(1+0.2)×0.1， =(6.3,3.8)×0.8， =1.2×0.1， =2.5×0.8， =0.12; =2; (270)25.92+(10.1,14.5×0.2)， (259)50.4?3.2×2.08， =25.92+(10.1,2.9)， =15.75×2.08， =25.92+7.2， =32.76; =33.12; (260)204?(3.4×0.5)， (271)0.487×12.5?48.7， =204?1.7， =0.487?48.7×12.5， =120; =0.01×12.5， (261)(43.26+2.34)?7.5， =0.125; =45.6?7.5， (272)(8.16+2.09)?[(10.3,9.3)?0.4]， =6.08; (262)(20,0.8×9)×5.7， =10.25?[1?0.4]， =(20,7.2)×5.7， =10.25?2.5， =12.8×5.7， =4.1 =72.96 (273)1.56×1.7+0.44×1.7， (263)13.25,0.8+1.75,1.2， =(1.56+0.44)×1.7， =(13.25+1.75),(1.2+0.8)， =2×1.7， =15,2， =3.4; =13; (274)12.5×(7.2,1.9)×0.8， (264)2.5×99+2.5， =12.5×5.3×0.8， =2.5×(99+1)， =12.5×0.8×5.3， =2.5×100， =10×5.3， =250;=53; (265)10.36+4.8,16.5?5， (275)0.25×2010+20.10×75， =10.36+4.8,3.3， =0.25×2010+2010×0.75， =15.16,3.3，=2010×(0.25+0.75)， =11.86; =2010×1， (266)12.5×2.4， =2010; =12.5×(8×0.3)， (276)30.8?[(6.34,4.59)×4]， =(12.5×8)×0.3， =100×0.3， =30.8?[1.75×4]， =30 =30.8?7， (267)38.78,19.59+41.22,30.41，=4.4( =38.78+41.22,19.59,30.41， =(38.78+41.22),(19.59+30.41)，