二年级数学估算题

370,137? 730,190? 850,550? 490,180? 320+510? 525? 223+513? 570-405? 488-327? 730,190? 652-712-131? 850,550? 490,180? 570-405? 830,308? 198+197? 509+192? 832-392? 246+177? 507+297? 308+312? 652-525? 320+510? 460+470? 280+450? 223+513? 631-120? 283+539? 274+524? 170+243? 642-269? 488-327? 712-131? 360+580? 430+170? 764? 178+115? 260+470? 340+130? 353+558? 803- 531-500? 146+674? 221+567? 176+344? 266+198? 276+189? 255-198? 810-466? 445-277? 356+626? 865-578? 445+385? 231-165? 248+187? 244+166? 425+165? 345+543? 957-679? 531+975? 987-799? 369+470? 198+231? 156+297? 324+167? 436+187? 342-197? 292+188? 292-188? 342-274? 258+553? 445+369? 468-389? 457+368? 235+198? 235-198? 365-198? 597+324? 385+247? 978-199? 467+333? 258-168? 365+198? 297+98? 297-98? 246+357? 270-144? 356+543? 820-278? 300-110? 771-419? 443+286? 893-818? 654+184? 176+234? 391+416? 432+316? 176+334? 910-284? 557-401? 435+481? 第 1 页 共 5 页 468-357? 569-367? 358+531? 785-436? 579-436? 275+421? 395-266? 487-358? 391+589? 252+166? 696+266? 856-213? 999-921? 920-378? 397+455? 423+493? 867-387? 711-117? 803-408? 707+220? 568-309? 859+583? 494+264? 971-508? 407+320? 929-611? 214+739? 299+437? 476-368? 459+339? 334+491? 313+478? 376+373? 305+631? 824-224? 469+293? 202+764? 309-196? 179+686? 483,283? 555-446? 620,480? 789-567? 280+450? 351+243, 319-273, 519+462, 341+632, 546+436, 453+408, 541-201, 934-255, 813+240, 259-176, 193+407, 279+134, 245-133, 481+277, 541+426, 569+410, 518-209, 964-273, 557-273, 516+402, 183+496, 326+148, 418-267, 304-284, 784+215, 342+478, 506-245, 247-198, 712-438, 236+419, 553-271, 843-357, 330-123, 569+103, 918-824, 828-290, 243-158, 487-438, 402+516, 462+178, 345-212, 331+613, 593-412, 530+190, 350+460, 274+891, 825-536, 772+101, 432-180, 346-126, 133+561, 527-436, 136+495, 923-184, 182+466, 213+345, 第 2 页 共 5 页 433+271? 531-432? 569-438? 443-276? 256+544? 102+896? 730,190? 540-380? 455+277? 150+317? 134+219? 483+421? 596+432? 118+412? 730,190? 945-424? 819-805? 797-153? 748-352? 475-388? 453-158? 935-362? 725-264? 807-369? 842-379? 480-324? 345-178? 623-158? 728-353? 972-85? 357-184? 220-126? 758-379? 536+89? 168+240? 370+453? 90+910? 74+926? 693+245? 403-184? 600-176? 800-592? 420-129? 603-396? 807-309? 1000-235? 1000-761? 189+198, 276+211? 380+426? 432+111? 56+433? 121+78? 250+163? 198+43? 74+926? 693+245? 263+578? 428+172? 546+315? 328+456? 84+453? 196+397? 704+198? 156+573? 546+127? 94+707? 90+910? 693+247? 198+409? 307+453? 65+485? 522+89? 168+240? 436+89? 276+211? 480+426? 503-207? 432+111? 672-652? 210-185? 930-166? 259+641? 710-347? 821-286? 615-347? 814-379? 603+287? 622-55? 189+207? 655-324? 516-409? 627-276? 646+76? 263+578? 597+324? 194+236? 1003-589? 403-197, 210-78? 第 3 页 共 5 页 605-328? 703-428? 75+927? 506-379? 947-443? 458-205? 738-351? 975-100? 975-542? 895-352? 972-216? 898-154? 640-478? 732-362? 937-113? 689-227? 682-215? 536-230? 926-507? 937-877? 645-52? 916-35? 896-304? 548-512? 395-277? 838-378? 662-127? 739-117? 463-263? 784-169? 488-204? 950-178? 895-783? 864-681? 123-74? 697-422? 386-48? 675+262? 651-139? 980-213? 395-289? 304+574? 829+80? 477+117? 987-841? 770+22? 528+362? 521+381? 413+186? 553+155? 468-449? 920-302? 476-151? 606+148? 153-44? 832-829? 697-85? 199+700? 248+485? 800-358? 737-682? 500-45? 606+305? 466+417? 330-57? 258-212? 675-255? 448-434? 117+266? 320+454? 865-578? 445+385? 552-209? 531+975? 987-799? 744-611? 468-389? 457+368? 370+207? 467+333? 258-168? 601-298? 307+448? 598+204? 254-108? 298+601? 1000-497? 369+528? 957-699? 348-204? 278+553? 459+369? 597+324? 395+257? 998-199? 226+348? 301-113? 171+249? 1003-303? 246+357? 第 4 页 共 5 页 273-149? 295+369? 700-263? 378-197? 468-357? 58+531? 258+648? 467-358? 258-138? 569-367? 3 139+895? 359+458? 995-775? 395+427? 622+190? 437+271? 736-675? 461+433? 833-732? 188+194? 166+262? 419+489? 275+421? 395-266? 487-358? 696+266? 856-213? 999-921? 256+728? 726-501? 168+753? 332+384? 361+331? 515+483? 423+493? 867-387? 711-17? 568-309? 859+583? 494+264? 771-419? 443+286? 893-818? 182+466? 715-594? 838+241? 929-611? 214+739? 299+437? 313+478? 376+373? 432+316? 469+293? 202+764? 145-117? 391+416? 910-294? 473+425? 662-523? 381+485? 39+497? 492+685? 549+448? 683-604? 476+451? 225+675? 433-219? 321+416? 892-871? 611-31? 778-706? 316-211? 967-702? 448-113? 933-137? 914-775? 689-143? 377-354? 991-187? 732-113? 502-214? 564-193? 252-153? 894-55? 713-243? 843-595? 819-268? 951-753? 778-691? 909-503? 441-67? 373-169? 852-776? 203-29? 105+43? 138+43? 28+583? 431+253? 541+361? 279+78? 第 5 页 共 5 页