3.8X2.6X0.25用简便方法怎么做

2024-12-16 11:15:03
推荐回答(3个)
回答1:

3.8X2.6X0.25
=(4-0.2)X2.6X0.25
=4X2.6X0.25+0.2X2.6X0.25
=(4X0.25)X2.6+(0.2X0.25)X2.6
=2.6+0.13
=2.73

回答2:

回答3: