Question

1.25-1.25x0.8简便运算？

Answer 1

1.25-1.25×0.8＝1.25-1＝0.25

Answer 2

1.25-1.25x0.8
=1.25x(1-0.8)
=1.25x0.2
=0.25

Answer 3

1.25-1.25*0.8
=1.25×（1-0.8）
=1.25*0.2
=0.25

Answer 4

此题可先提取公因数：1.25−1.25×0.8=1.25×(1−0.8)=1.25×0.2=0.25