7.2x5.8+0.72x42用简便计算

2024-11-22 22:17:08
推荐回答(2个)
回答(1):

7.2x5.8+0.72x42
=7.2x5.8+7.2x4.2
=7.2x(5.8+4.2)
=7.2x10
=72

回答(2):

7.2x5.8+0.72x42
=7.2×5.8+7.2×4.2
=7.2×(5.8+4.2)
=7.2×10
=72