Question

1.25✘0.625+12.5✘0.0175+1.2÷4/5

Answer 1

解题
原式=2.5
解题分析
考虑提取1.25作为共同项，把12.5分解为1.25×10。
1.25×0.625+12.5×0.0175+1.2÷4/5
=1.25×0.625+1.25×10×0.0175+1.2×5/4
=1.25×（0.625+0.175）+1.5
=1.25×0.8+1.5
=1+1.5
=2.5

Answer 2

=1.25×0.625+1.25×0.175+1.2×1.25
=1.25×（0.625+0.175+1.2）
=1.25×2
=2.5

Answer 3

原式=0.78125+0.21875+1.5
=1+1.5
=2.5

Answer 4

解：用最简方法计算更加容易
=1.25×0.625+1.25×0.175+1.2×1.25 提公因式1.25
=1.25×（0.625+0.175+1.2）
=1.25×2
=2.5

Answer 5

1.25*0.625+12.5*0.0175+1.2÷4/5
=1.25*0.625+1.25*0.175+1.2*5/4
=1.25*0.625+1.25*0.175+1.2*1.25
=1.25*（0.625+0.175+1.2）
=1.25*2
=2.5