5.27+2.86-0.66+1.63用简便运算怎么算(梯等式)

问题描述:

5.27+2.86-0.66+1.63用简便运算怎么算(梯等式)
快,今天就要,

=(5.27+1.63)+(2.86-0.66)
=7+2.2
=9.2