66乘35加35加33乘55用簡便計算
66*35+35+33*55
=35*(66+1)+33*55
=35*67+33*(35+20)
=35*(67+33)+33*20
=3500+660
=4160
6.66×1.2+3.33×7.6的簡便運算是
6.66×1.2+3.33×7.6
=3.33×2×1.2+3.33×7.6
=3.33×(2.4+7.6)
=3.33×10
=33.3
5/14×12/25×7/9簡便運算= = =
5/14×12/25×7/9 =簡便運算
5/14×12/25×7/9
= 5/(2×7)×(2×2×3)/(5×5)×7/(3×3)
= 1/1×2/5×1/3
= 2/15
12分之7-(12分之5+9分之1)如何簡便計算
12分之7--(12分之5+9分之1)=7/12--5/12--1/9
=2/12--1/9
=1/6--1/9
=3/18--2/18
=1/18.
1.2×9.9+0.12簡便運算
=1.2x9.9+1.2x0.1=1.2x(9.9+0.1)=12
12.5×9.8×0.8簡便計算
12.5×9.8×0.8
=12.5×0.8×9.8
=10×9.8
=98
12+(-25)+25+23=如何簡便運算
=12+23+(25-25)
=35
希望能帮忙你,懂了請採納,
12\0.25的簡便運算
12÷0.25
=(12×4)÷(0.25×4)
=48÷1
=48
12除以1.25的簡便運算?
12除以1.25的簡便運算:12除以1.25=12除以5/4=12乘以4除以5=48除以5=9.61.25可化為5/4或為10/8,12除以5/4或10/8,整數計算方便一些.12*4/5=48/5=9.6
89乘99加89怎樣用簡便方法
89*99+89=89*(99+1)=89*100=8900