1、四年级数学简便计算题及答案 1) 125 (17 8) 4 2) 375 480 + 6250 48 3)25 16 125 4)13 99 5)75000 125 15 6)7900 4 25 7)150 40 50 8)5600 (25 7) 9)210 42 6 10)39600 25 11)67 21 18 21 + 85 79 12)321 81 + 321 19 13)222222 999999 14)333333 333333 15)56000 (14000 16) 16)654321 909090 +654321 90909 17)34 3535 35 3434 18)2700
2、0 125 19)345345 15015 20)347 + 358 + 352 + 349 21)75 45 + 17 25 22)599996 + 49997 + 3998 + 407 + 89 23) (48 75 81)(24 25 27) 答案 1)125 (17 8) 4 2)375 480 + 6250 48 = 1258417 =480(375625) =100068 =480000 =68000 3)25 16 125 4)13 99 =2528125 =13(1001) =50000 =130013 =1287 5)75000 125 15 6)7900 4 25 =751
3、00012515 =7900(425) =75151000125 =79 =58 =40 7)150 40 50 8)5600 (25 7) =1505040 =56100257 =340 =56710025 =120 =32 9)210 42 6 10)39600 25 =210766 =39610025 =30 =3964 =1584 11)67 21 18 21 + 85 79 12)321 81 + 321 19 =21(67+18)+8579 =321(81+19) =2185+8579 =32100 =85(21+79) =8500 13)222222 999999 14)3333
4、33 333333 =222222(10000001) =111111999999 =222222000000222222 =111111(10000001) =222221777778 =111111000000111111 =111110888889 15)56000 (14000 16) 16)654321 909090 +65432190909 =560001400016 =654321999999 =416 =654321(1000001) =64 =654321000000654321 =654320345679 17)34 3535 35 3434 18)27000 125 =3
5、4351013534101 =271000125 =0 =278 =216 19)345345 15015 20)347 + 358 + 352 + 349 =3451001(151001) =35043+8+21 =3451510011001 =1400+6 =23 =1406 21)75 45 + 17 25 22) 599996 + 49997 + 3998 + 407 + 89 =25345+1725 =600000+50000+4000432+407+89 =25(135+17) =65400+487 =25152 =65887 =25438 =3800 23) (48 75 81)(24 25 27) =482475258127 =233 =18