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
=2.7×3.8-0.27×2.8×10
=2.7×3.8-2.7×2.8
=2.7×(3.8-2.8)
=2.7×1
=2.7
不懂可以追问,有帮助请采纳,谢谢
答
2.7×3.8-0.27×28
= 2.7×3.8 - 2.7×2.8
=2.7×(3.8 - 2.8)
= 2.7×1
= 2.7
答
2.7×3.8-0.27×28
=2.7x3.8-2.7x2.8
=2.7x(3.8-2.8)
=2.7x1
=2.7