2.7×3.8-0.27×28如何简便运算?
问题描述:
2.7×3.8-0.27×28如何简便运算?
答
2.7×3.8-0.27×28
=2.7x3.8-2.7x2.8
=2.7x(3.8-2.8)
=2.7x1
=2.7