数学二年级估算练习题及答案

数学二年级估算练习题及答案 精品文档 数学二年级估算练习题及答案 308+312?223+513?642-269?178+115? 531-500?276+189?865-578?425+165? 369+470?342-197?445+369?365-198? 258-168?270-144?443+286?432+316? 850,550? 09+192? 652-525?631-120?488-327?260+470? 146+674?255-198?445+385?345+543? 198+231?292+188?468-389?597+324? 365+198?356+543?893-818?176+334? 490,180? 32-392? 320+510?283+539?712-131?340+130? 221+567?810-466?231-165?957-679? 156+297?292-188?457+368?385+247? 297+98?820-278?654+184?910-284? 第 1 页 共 页 570-405?246+177? 460+470?274+524?360+580?353+558? 176+344?445-277?248+187?531+975? 324+167?342-274?235+198?978-199? 297-98?300-110?176+234?557-401? 830,308?07+297? 1 / 12 精品文档 280+450? 170+243? 30+170?803-764? 266+198? 356+626? 44+166?987-799? 436+187?258+553?235-198?467+333? 246+357?771-419?391+416?435+481? 696+266?423+493? 568-309?929-611?334+491?469+293? 555-446?319-273,541-201,279+134, 518-209,326+148,506-245,843-357, 243-158,331+613,825-536,527-436, 856-213?867-387? 859+583?214+739?313+478?202+764? 620,480? 19+462,934-255,245-133, 964-273,418-267,247-198,330-123, 487-438,593-412,772+101,136+495, 999-921?711-117? 494+264?299+437?376+373?309-196? 789-567?341+632,813+240,481+277, 557-273,304-284,712-438,569+103, 402+516,530+190,432-180,923-184, 第 页 共 页 920-378?803-408? 2 / 12 精品文档 971-508?476-368?305+631?179+686? 280+450?546+436,259-176,541+426, 516+402,784+215,236+419,918-824, 462+178,350+460,346-126,182+466, 397+455?707+220? 407+320?459+339?824-224? 483,283? 351+243, 53+408, 193+407,9+410, 183+496,2+478, 53-271,8-290, 345-212, 74+891, 133+561, 13+345, 134+219?945-424? 453-158?480-324?357-184?370+453? 600-176? 1000-235? 32+111?74+926? 328+456?546+127?307+453?276+211? 210-185?615-347?655-324?597+324? 483+421?819-805? 935-362?345-178?220-126?90+910? 800-592?1000-761?+433?693+245? 84+453?94+707?65+485?480+426? 930-166?814-379?516-409?194+236? 596+432?797-153? 3 / 12 精品文档 725-264?623-158?758-379?74+926? 420-129?189+198,121+78?263+578? 196+397?90+910?522+89?503-207? 259+641?603+287?627-276? 1003-589? 第 页 共 页 118+412?748-352? 807-369?728-353?536+89?693+245? 603-396?276+211?250+163?428+172? 704+198?693+247?168+240?432+111? 710-347?622-55?646+76?403-197, 730,190? 75-388? 842-379? 72-85? 168+240?03-184? 807-309?80+426? 198+43?46+315? 156+573? 198+409?36+89?72-652? 821-286? 189+207? 263+578?10-78? 972-216?689-227? 645-52?838-378?488-204?697-422? 395-289?770+22?468-449?832-829? 737-682?258-212?865-578?744-611? 258-168?298+601?278+553?226+348? 4 / 12 精品文档 898-154?682-215? 916-35?662-127?950-178?386-48? 304+574?528+362?920-302?697-85? 500-45?675-255?445+385?468-389? 601-298? 1000-497? 59+369?301-113? 640-478?536-230? 896-304?739-117?895-783?675+262? 829+80?521+381?476-151?199+700? 606+305?448-434?552-209?457+368? 307+448?369+528?597+324?171+249? 第 页 共 页 732-362?926-507? 548-512?463-263?864-681?651-139? 477+117?413+186?606+148?248+485? 466+417?117+266?531+975?370+207? 598+204?957-699?395+257? 1003-303? 937-113?37-877? 395-277?84-169? 123-74?80-213? 987-841?53+155? 153-44?00-358? 330-57?20+454?87-799?67+333? 254-108?48-204?98-199?46+357? 5 / 12 精品文档 139+895?437+271? 166+262?696+266?168+753?867-387? 771-419?838+241?376+373?391+416? 39+497?225+675?778-706?914-775? 502-214?843-595?441-67?138+43? 359+458?736-675? 419+489?856-213?332+384?711-17? 443+286?929-611?432+316?910-294? 492+685?433-219?316-211?689-143? 564-193?819-268?373-169?28+583? 995-775?461+433? 275+421?999-921?361+331?568-309? 893-818?214+739?469+293?473+425? 549+448?321+416?967-702?377-354? 252-153?951-753?852-776?431+253? 第 页 共 页 395+427?833-732? 395-266?256+728?515+483?859+583? 182+466?299+437?202+764?662-523? 683-604?892-871?448-113?991-187? 894-55?778-691?203-29?541+361? 622+190? 188+194? 6 / 12 精品文档 487-358?726-501?423+493? 494+264? 715-594?13+478? 145-117?81+485? 476+451?11-31?33-137?32-113? 713-243?09-503? 105+43?79+78? 二年级下册混合运算练习题×,， 77-46+3265-38+2679+19-56,,, ,,, ?884-27+16=+27-1,, ,,3+23+969- ,, ,,×6×, , , ,4×6，0?4，6,, ,, ×79×6，410, , , ,7-76+361-38+2 ,,,, , , 99+ , , ×9×, = ×8，, , ，5×, , 18-36+27-27+10+ , , , , , , 73-23-3-71- ,, , , 9-46+365-39+2, ,59-36+2, ,93-23+94,, 9-96+369-39+2,, ×2，,, , ,,94-29+9,,33- , , , , ×,,, 99+99-5, , 30- , , 99- , , 7 / 12 精品文档 99+99-9, , ? ，232?4，1, ,, , ,, 29,4×16?2×2?6×, ,, ,9-36+299-29+9 ,, +23+94, ,5-46+2265-28+2, ,58-26+25, ,82+22+8, , ,, ,93- , ,84-25+1668-, 99- 58+18-56 4+25-1, ,0- ,, ,, ,,,,,, ,, 55-56+21-28+2658+18-16, , , , , , 18-26+285-25+10+ , , , ,52-22-2-51-, ,8-46+2, ,8-26+, , 82-22+,,88-86+22, , , , ,65-28+2, ,84-28+8 ,,2- 8-28+2 , , , , , 88+88-56, , 20-8- , , ,,,, 88-26+28-28+8620- , , , , , , 22+22+882-88+ , , , ,7-46+3 , ,6，72?8,,42?,, ×,,5×3，9,, 8 / 12 精品文档 , 3-38+2, , ×8,,× ,,?6,,×8，30 , , , 79+19-36, , , ，8×4 ×,,6,,,, 二年级下册混合运算练习题×,， 77-46+35-38+269+19-56, , , , , , ?84-27+16=4+27-1, , , , , , 93+23+69-99+ , , ×86, , ×6，20, , ×9, , 7-76+3 , , 18-36+27, ,-23-4, , 9-46+3 , , , , × , , ?4，6, , ×6， 10, , 1-38+26, ,87-27+1 , , 3-, , 5-39+26, , , , ×9×, , ×8，, , ，5×, , 79+19-1, , 30+ , , 71- , , 99+99-5, , 59-36+2994-29+90- , , , , , , 93-23+93-99- , , , , , , 9 / 12 精品文档 99-96+3269-39+2699+99-9, , , , ×2，77, , ?3, ,,4× 16, , 9-36+29, , +23+94, , 5-46+22, ,-26+25, ,+22+84, , , × 19, , ，2732, , ?2×42, ,9-29+96, ,3-, ,5-28+2, ,4-25+16=, ,68- , , , ，9×, , ?4，1, , ?6×, , 30- , , 99- , , 58+18-5, , +25-1, , 88+ , , 55-56+2261-28+2658+18-16, , , , , , 18-26+285-25+160+ , , , , , , 52-22-82-51- , , , , 8-46+2 , ,-26+, ,-22+84, , 8-86+2, , 8-26+, , 2+22+8, , 7-46+32, ,，72?, , ,65-28+2 , ,84-28+8, ,22- , ,68-28+2 , ,88-28+8 , ,82- , , 3-38+26, , ×8, , , 88+88-56, , 20- , , 88- , , 10 / 12 精品文档 88+88-86, , 20- , , 88+ , , 79+19-36, , , , , 42? ×，8×, , , , , , × ? ×, , , , , , 5×3，9×8，30 ×7，30 , , , , ×8，6, ,-36+, , 3+23+, , 7-76+3 , , 18-36+, ,-23- , , 9-46+3, ,-36+2, , , ? , ,4-27+16= , , 9- , ,61-38+2 , , 87-27+1, ,3- , ,3-39+2 , ,4-29+96, , , 36? , , 4+27-1, , 99+, , 79+19-1, , 30+ , , 71-, , 99+99-36, , 30- , , 93-23+93-99- , , , , , , 99-96+3269-39+2699+99-96, , , , , , 11 / 12 精品文档 99-36+299-29+90- , , , , 3+23+9, , 0- , , ×636, , ×8,21 , ,?7×0, , 3-46+2, ,-26+2, ,+22+84, , ,3- , , ?934, , ?9×6, , , ，4×68, , ,9×, ,3-28+26, ,84-23+1 , ,68-, , , 99- , , ，8×, , ?, , ×4+, , × , , 38+18-3 , , 4+23-1, , 88+ , , 12 / 12