0.375ⅹ3.5-1⼀2ⅹ3⼀8脱式计算?

2025-03-05 09:32:44
推荐回答(1个)
回答1:

0.375x3.5-1/2x3/8
=3/8x7/2-1/2x3/8
=3/8x(7/2-1/2)
=3/8 x3
=9/8