12.75+3.87-2.75=?(简便计算)
问题描述:
12.75+3.87-2.75=?(简便计算)
答
12.75+3.87-2.75
=12.75-2.75+3.87
=10+3.87
=13.87
答
12.75+3.87-2.75
=(12.75-2.75)+3.87
=10+3.87
=13.87