5.8乘3.7 加0.58乘4.2加5.8乘0.21简便方法

2024-11-22 06:16:20
推荐回答(1个)
回答(1):

5.8×0.37 +0.58×4.2+5.8×0.21
=5.8×0.37 +5.8×0.42+5.8×0.21
=5.8×(0.37 +0.42+0.21)
=5.8×1
=5.8