8.79-6.78-0.99能用简便运算吗?
问题描述:
8.79-6.78-0.99能用简便运算吗?
答
8.79-(6.78+0.99)
=8.79-7.77
=1.02
答
8.79-6.78-0.99 = 2.01-(1-0.01)=2.01-1+0.01=1.02