一根电线长1.2米,截去20%后,再截去0.2米,还剩多少米?

问题描述:

一根电线长1.2米,截去20%后,再截去0.2米,还剩多少米?

1.2×(1-20%)-0.2,
=1.2×0.8-0.2,
=0.96-0.2,
=0.76(米);
答:还剩下0.76米.