小括号和中括号的简便算法 括号45.2-15.42括号完乘以1.8简便运算

括号45.2-15.42括号完乘以1.8简便运算  

括号45.2-15.42括号完乘以1.8简便运算

（45.2-15.42）x1.8
=29.78x1.8
=（30-0.22）x1.8
=30x1.8-0.22x1.8
=54-0.396
=53.604

括号87.5+1.25括号乘以0.9简便运算

（87.5+1.25）x0.9
=88.75x(1-0.1)
=88.75-88.75x0.1
=88.75-8.875
=88.75-9+0.125
=97.75+0.125
=97.875

简便运算9.7乘以括号2.45减0.35括号

9.7x(2.45-0.35)
=9.7x2 +9.7x0.1
=19.4 +0.97
=20.37

括号15.4-7.8括号乘以3.5简便运算

（15.4-7.8）x3.5
=7.6x5x0.7
=38x0.7
=26.6

361乘以96括号361乘以48括号的简便运算

361×96+361×48
=361×（96+48）
=361×144
=51984

13括号34.5减2.5括号乘以3.12简便运算

13（34.5-2.5）x3.12
=13x32x3.12
=416x3.12
=1297.92

括号72÷18+28括号乘以2简便运算

(72÷18+28)×2
=(4+28)×2
=32×2
=64

105除以括号5乘以7括号完毕简便运算

原式=105÷5÷7
=21÷7
=3

0.51÷括号1.2-1.03括号乘以5.5的简便运算

0.51÷（1.2-1.03）x5.5
=0.51÷0.17x5.5
=3x5.5
=16.5

括号18.4+27.83÷4.6括号乘以0.2的简便运算

(18.4+27.83÷4.6)X0.2
=(18.4+6.05)÷5
=24.45÷5
=4.89