1.25-8÷6点4×0.2用简便方法怎么做?

2025-12-05 12:15:37
推荐回答(1个)
回答1:

解:用简便方法计算:
1.25-8÷6.4x2
=1.25-8x1/6.4x2
=1.25-1.25x2
=1.25x(1-2)
=1.25x(-1)
=-1.25