2.6×7.8+3.6×2.2用递等式计算怎么写?

2024-12-16 03:53:23
推荐回答(3个)
回答1:

2.6×7.8+3.6×2.2
=2.6×7.8+(2.6+1)×2.2
=2.6×7.8+2.6×2.2+1×2.2
=2.6×(7.8+2.2)+2.2
=2.6×10+2.2
=26+2.2
=28.2

回答2:

递等式计算过程方法如下
解:2.6×7.8+3.6×2.2
=20.28+7.92
=28.2

回答3:

2.6×7.8+3.6×2.2
=20.28+7.92
=28.2