123*(6.42/69.3)/(3.21/23.1)简便运算

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123*(6.42/69.3)/(3.21/23.1)简便运算
123*(6.42/69.3)/(3.21/23.1)简便运算

123*(6.42/69.3)/(3.21/23.1)简便运算
123×(6.42÷69.3)÷(3.21÷23.1)————去括号
=123×6.42÷69.3÷3.21×23.1————变一变,就便便
=123×(6.42÷3.21)÷(69.3÷23.1)
=123÷3×2
=41×2
=82

123*(6.42/69.3)/(3.21/23.1)
=123*3.21*2/2.31*30/(3.21/23.1)
=123*3.21*23.1*2/2.31*3.21*30
=123*2/3
=82

然后先分式约分,再计算

123*(6.42/69.3)*(23.1/3.21)
=123*2/3
=82