98.7×2+98.7×7+98.7怎么简便运算
问题描述:
98.7×2+98.7×7+98.7怎么简便运算
答
98.7×2+98.7×7+98.7
=98.7×2+98.7×7+98.7×1(这一步可省略)
=98.7×(2+7+1)
=98.7×10
=987