简便计算:1.36-1 2/7+2.64-5/7
问题描述:
简便计算:1.36-1 2/7+2.64-5/7
答
1.36-1 2/7+2.64-5/7
=1.36+2.64-(1又2/7+5/7)
=4-2
=2