ldcf.net
当前位置:首页 >> 38×8+6×388×4的简便方法脱式计算咋写? >>

38×8+6×388×4的简便方法脱式计算咋写?

38×8+6×38-38×4 =38×(8+6-4) =38×10 =380

解答如下: 两个算式的简便运算如下 8×34 =8X(30+4) =8X30+8X4 =240+32 =272 80×6 =8X10X6 =48X10 =480

2012年1月28日星期六一、口算题小数加法:0.3+1.5=2.5+9.8=7.6+1.3=4.4+5.7=2.3+7.7=5.7+3.1=7.69+2.31=9.16+2.64=5.68+12.22=16.8+16.5=小数减法:6.8-3.8=4.26-3.71=0.88-2.12=5.34-69.21=68.4-61.5=9.58-3.7=18.94-5.66=15.69-9.78=115-68.59...

6.8×9.9 =6.8×(10-0.1) =6.8×10-6.8×0.1 =68-0.68 =67.32

6.8X0.41十0.59X6.8等于6.8X(0.41+0.59)等于6.8X1

34×3.535-3.5×34.34 =34×3.5×1.01-3.5×34×1.01 =0 8+89+899+8999+89999 =9+90+900+9000+90000-5 =99999-5 =99994 0.67×2.1+0.018×21+8.5×0.79 =0.67×2.1+0.18×2.1+8.5×0.79 =(0.67+0.18)×2.1+8.5×0.79 =0.85×2.1+0.85×7.9 =0.85×(2.1+7.9) =...

解: 3.5×6.8+0.68+6.8×6.4 =3.5×6.8+0.1×6.8+6.8×6.4 =6.8×(3.5+0.1+6.4) =6.8×10 =68

(1)36-27+43,=9+43,=52;(2)48÷6×5,=8×5,=40;(3)42+6×4,=42+24,=66;(4)(26-19)×5,=7×5,=35;(5)37-27÷3,=37-9,=28;(6)64÷(24-16),=64÷8,=8;(7)(23+22)÷4,=45÷4,=11.25;(8)80+(100-86),=80+14,=94.

  3.6×(9.8÷0.3×4)=3.6×9.8÷0.3×4=3.6÷0.3×4×9.8=12×4×9.8=470.4

解:采用分配律, 原式=68×0.11+8.9×6.8 =6.8x1.1+6.8x8.9 =6.8x(1.1+8.9) =6.8x10 =68

网站首页 | 网站地图
All rights reserved Powered by www.ldcf.net
copyright ©right 2010-2021。
内容来自网络,如有侵犯请联系客服。zhit325@qq.com