515.6×13.1-15.6-15-6×2的简便计算是什么?

2025-03-12 20:51:04
推荐回答(2个)
回答1:

15.6×13.1-15.6-15.6×2
=15.6×(13.1-1-2)
=15.6×10.1
=15.6×10+15.6×0.1
=156+1.56
=157.56

回答2:

515.6×13.1-15.6-15.6x2=(500+15.6)x13.1-15.6x3=500x13.1+15.6x13.1-15.6x3=6550+15.6x(10+3+0.1)一15.6x3=6550+15.6x10+15.6x3+15.6x0.1-15.6x3=6550+156+1.56=6607.56