7.8*5.6+2.3*4.4怎么简算?

2025-03-23 21:32:38
推荐回答(1个)
回答1:

7.8X5.6+2.3X4.4
=7.8X(10-4.4)+2.3X4.4
=78-7.8X4.4+2.3X4.4
=78-4.4X5.5
=53.8