下面各题怎样简便就怎样算.1.2×2.5+0.8×2.58.16÷0.25÷4

2024-11-25 12:42:23
推荐回答(1个)
回答1:

(1)码旦1.2×2.5+0.8×2.5
=(1.2+0.8)×2.5
=2×2.5
=5

(举枝2)迟答扰8.16÷0.25÷40
=8.16÷(0.25×40)
=8.16÷10
=0.816

(3)2.5×7.9×0.8
=(2.5×0.8)×7.9
=2×7.9
=15.8