四年级简便运算方法2.5x0.6-1.8x0.5的简便运算方法

2024-11-16 21:49:40
推荐回答(1个)
回答(1):

2.5x0.6-1.8x0.5
=0.5×5×0.6-0.3×6×0.5
=0.5×3-0.3×3
=0.2×3
=0.6