9.7-3.75-1.25+10.3简便计算
问题描述:
9.7-3.75-1.25+10.3简便计算
答
9.7-3.75-1.25+10.3
=(9.7+10.3)-(3.75+1.25)
=20-5
=15
答
9.7-3.75-1.25+10.3
=9.7+10.3-(3.75+1.25)
=20-5
=15