四年級數(shù)學(xué)四則運(yùn)算與簡便計算練習(xí)題

1、四則運(yùn)算與簡便計算練習(xí)題一、計算下面各題121 111 + 37(121 111 + 37) X 5280 + 650 + 1345 X 20 X 31000 (280 + 650 + 13 )(95 19 X 5 ) +74(120 103) X 50760 + 10 + 38(270 + 180) + (30 15 )707 35 X 20(95 19 X 5 )+7419X 96-962+ 7410000-(59 + 66) X645940+ 45X (798-616)(270 + 180) + (30 15)(315 X 40- 364) +712520+ 8X(121 +11)(20

2、10- 906) X (65+15)707 35 X 2050+160+ 40(58+370) + (64-45)120-144+ 18+35 347+45X 2-4160+ 52(58+37) + ( 64-9X5)95+ (64-45)178-145+ 5X6+42420+58064 X 21 + 28812-700+ ( 9+31X 11)(136+64) X ( 65-345+ 23)85+14X ( 14+208+ 26)121 111 + 37(120 103) X 50(284+16) X ( 512-8208+18)120-36 X 4+18+35(58+37) + ( 64-

3、9X5)45 X 20 X 3(121 111 + 37) X 5280 + 650 + 131000 (280 + 650 + 13 )760 + 10 + 389846- 87 X (360+60)(12485) X 12+26325+ 13X(266 -250)508X345+ (1526 -1521)(59+ 21) X (96+ 8)140- 90+ 5+67849 X 102 2X49125X 76X8103 32二、面各題，怎樣簡便就怎樣計算。（24分）41000+ 8+1256756 193 2075824+ 8X （ 85 78）840+ 28+ 70X 18794-1986

4、8X 25 72X 12597X 360+ 3X 360384+ 98X 25X 4724+26X 24+724三、用簡便方法計 算（ 12 分）756-193- 207101X924800+ 25+488 X 125428X 50+71X 50+5098X 134（加減法接近整百 數(shù)的簡算）184 98695 202864 199738 301（加法交換律和結(jié) 合律的運(yùn)用）380 476 120（569 468）（432 131）（減法的簡算，重 點(diǎn)：運(yùn)算符號變化的處理）256 147 53373 129 2989（ 89 74）456（ 256 36）結(jié) 合律的運(yùn)用，重點(diǎn)：一個因數(shù)分成兩個

5、因數(shù)的處理）28X 4X25125X 32X259X72X125158+262+138375+219+381+2255001 247 1021 232數(shù) 的簡算）102X 35（乘法分配律的運(yùn) 用）26 X 39+ 61X2698 X 42356X 956X978X 101- 7852X76+ 47X 76 + 76134X 56- 134+ 45X 13499X 55+ 55綜 合運(yùn)用）48X 52X2 4X4825X 23X （40 + 4）999X 999+ 1999四、綜合練習(xí):(105+24) X 15-3175+280 40-25(205-101 + 152) +8276+228+

6、353+219178X 101- 178(375+1034)+(966+125)(2130+783+270)+101799+999+9999+9999988X125102X767755- (2187+755)2214+638+2863065- 738-1065899+3442357 183 317 3572365 1086 214497 2992370+199525X (24+16)3999+4981883-39812X2575X 2425X 32X12579X 42+79+79X 57138X25X4(13 x 125) x (3 x 8)(12+24+80) x 50704 25178 9

7、9+17825 32 12532 (25+125)88 125102 7658 9858 98178X101 17884X36+64X 8475X 99+2X 758100+ 4 + 7516800+ 12083x 102 83X250X(34X4) x 325X (24+16)704X257300+ 25+498X 199123X 18 123X3+85X123178X 99+17875 X 24138X25X479 X 42+79+79X 577300+ 25+48100+ 4+75(13 X 125) X (3 X 8)16800+ 12030100+ 210032000+ 400497

8、00+ 700(12+24+80) X 501248+ 243150+ 154800+ 2521500+125123X 18- 123X 3+85X 123378+44+114+242+222276+228+353+219(375+1034)+(966+125)99+999+9999+99999 7755- (2187+755)2214+638+2863065- 738 1065899+3442357 183 317 3572365 1086 214497 2992370+1995 3999+49850X (34X4) X 31883- 39812X2584 X 36+64X 8475 x 9

9、9+2X 7583 x 102 83X 298X 199五、脫式計算：128+35X3104X 9-72+818X 5+522+3450+ 5+29X6560+ 4-630+7(42+18) X ( 56-26)149X 5+520X43+(289- 198) X 264X 8+78X 2226 X 4-425+5(135+65) + ( 15-7)300- (76+40X3)45+55+ 5 -20700-125X3145-150+ 2+2348X 3+240X2784+ 8+105X4(210+630) +7162+ 6-96+8900+ ( 15-3)7362+ 9X7(439+725)

10、 +68(100-51) +17(37X 15-55) X8(279+32X 15) X6412X (280-80+4)330+ 5+46X7984+ 6X389X 2+86252+ 9+ ( 11-4)522+ ( 328-319) +42305X (400-395) -27858X (6X4) +29953-180X5388+ 9-668+440 X (5+3)(445+ 5+172) X18(488+32X5) +12400-225+5+145156+187+17X9325+13X (266-250)(242+556) + 14X8(160+880) X20550+230X 62+314

11、000+25- 13X 12六、簡便運(yùn)算199999 + 19999 + 1999 + 199 +199999X2222 + 3333X 33349-2.45-1.6521+0.56+11.364.89-7.88-13.627+56X7.83+2.34-0.83+6.6635.6-1.8-15.6-7.248.4+2.78+51.6-0.783.07-0.38-1.62132.44-(58.74+19.44)13.75-(3.75+6.48)47.8-7.45+8.215.2-6.8-3.457.5+4.9-6.31.76+3.44+0.3523.4+3.4-0.237.5+4.9-6.523.4-0.8+13.45.93+0.49+2.0656x3+56X98766X 98768 七、小數(shù)加減混合運(yùn)算題25.6-(0.23+5.6)-1.773.82+2.9+0.18+9.15.93+0.19+2.8123.4+0.8-13.4-7.21.27+3.9+0.73+15.17.5+4.8-6.57.14-0.53-2.4736.8-4.5+6.981.76+0.65+3.243.45+1.79+0.6536.54-1.76-8.666.02+3.6+1.9836.8-3.9-6.8832+4.9-8.696-56X 57+5698765X 9876913.75-(4.7