递等式计算能简便用简便方法计算5.5乘8.2+1.8乘5.5

2025-03-30 10:56:34
推荐回答(3个)
回答1:

5.5*8.2+1.8*5.5
=5.5*(8.2+1.8)
=5.5*10
=55

回答2:

原式=5.5×(8.2+1.8)
=5.5×10
=55

回答3:

=5.5×(8.2+1.8)=55