12.8+7.2*2.08用简便方法?

2025-03-10 13:17:32
推荐回答(1个)
回答1:

12.8+7.2*2.08
=12.8+7.2*(1+1+0.08)
=12.8+7.2+7.2+0.576
=20+7.2+0.576
=27.2+0.576
=27.776