1、1 三年级数学上册简便计算练习三年级数学上册简便计算练习 班级考号姓名总分班级考号姓名总分 1.24+63+52+17+49+81+74+38+952.7+97+997+9997+99997 3.45000(2590)4.5357-4742 5.1266+12646.617+2383 7.2999+9999998.132512548 9.197198-19619910.1135-375 11.3799+1116712.666111+222667 13.2514+(753-251)214.8037+4763 15.4999500116.3737+26337+6363 17.1117+1719+2
2、017+4019+3717 18.(1+2+3+4+99+100)-(2+4+6+8+96+98) 2 附:参考答案附:参考答案 1.4931.493 = (63+17) + (52+38) + (49+81) +24+74+95=493 2.1110952.111095 =10-3+100-3+1000-3+10000-3+100000-3 =10+100+1000+10000+100000-15 =111095 3.203.20 =450002590 =450009025 =50025 =20 4.10004.1000 =5 ( 5+1 ) 100+37-4 ( 4+1 ) 100+37
3、=3000+21-2000-21 =1000 5.12605.1260 =126(6+4) =1260 6.6006.600 =6(17+83) =600 7.10010007.1001000 =2000+999+999999 =2000+(999+1)999 =2000+999000 =1001000 8.13000008.1300000 =13(254)(1258) =131001000 =1300000 9.29.2 =(196+1)198-196(198+1) =196198+198-196198-196 =198-196 =2 10.1010.10 =1135-1115 =(113-
4、111)5 =10 11.1110011.11100 =37333+11167 =11133+11167 =111(33+67) =11100 12.22200012.222000 =2223111+222667 =222333+222667 =222(333+667) =2221000 =222000 13.200813.2008 =2514+(2513-251)2 =2514+25122 =2518 =2008 14.592114.5921 =(47+33)37+4763 =4737+4763+3337 =47(37+63)+11337 =4700+11111 =4700+1221 =5921 15.2499999915.24999999 =(5000-1)(5000+1) =5000-1 =24999999 16.1000016.10000 =3737+6337+6337+6363 =37(37+63)+63(37+63) =37100+63100 =(37+63)100 =10000 17.717.7 =(11+20+37)17+(17+40)19 =4+3 =7 18.260018.2600 =(1+3+5+7+99)+(2+4+6+8+100)- (2+4+6+8+98) =(1+9)2+100 =2600