5.7*2.9+5.7*8.1-5.7简便运算
问题描述:
5.7*2.9+5.7*8.1-5.7简便运算
答
5.7×2.9+5.7×8.1-5.7
=5.7×(2.9+8.1-1)
=5.7×10
=57