简便运算如下:
0.78×10.1-78×0.001
=0.78×10.1-(0.78×100)×0.001
=0.78×10.1-0.78×100×0.001
=0.78×10.1-0.78×(100×0.001)
=0.78×10.1-0.78×0.1
=0.78×(10.1-0.1)
=7.8
0.78x10.1-78x0.001如何简便计算?
0.78x10.1-78x0.001
=0.78x10.1-0.78x0.1
=0.78x(10.1-0.1)
=0.78x10
=7.8
合并同类项,没有就自己动手改造,
0.78*10.1-78*0.001
=7.8*1.01-7.8*0.01
=7.8(1.01-0.01)
=7.8