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6.2%1.9X0.6÷7.6简便计算

关键是看出7.6是1.9的整数倍

可以找最大公约数分子分母约分!最大公约数是1.9,7.6÷1.9=4 原式=6.2-1×0.6÷4

6.2-1.9x0.6/(1.9*4)

=9x7/6-7/6x9/2 =7/6x(9-9/2) =7/6x9/2=21/4

哥们,是这样的,小学的老师呢就这样交我们先乘除后加减!如果正常的运算呢就是 5.7-1.9×0.2

5.7-1.9x0.2➗7.6 =5.7-3.8/7.6 =5.7-0.5 =

原式 =(12.6÷1.4)x(7.6÷1.9)x(2.32÷2.9) =9x4x0.8 =3

原式=(12.6÷1.4)×(7.6÷1.9)×(2.32÷2.9) =9×4×0.8 =36×

5.7-1.9x0.2÷7.6 =5.7-0.2÷4 =5.7-0.05 =5.65

18.8÷[0.2×(7.6-2.9)] =18.8÷[0.2×4.7] =18.8÷0.2÷4

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