8.4+3.5-8.4+3.5脱式计算.
问题描述:
8.4+3.5-8.4+3.5脱式计算.
答
8.4+3.5-8.4+3.5
=(8.4-8.4)+3.5+3.5
=0+3.5+3.5
=3.5+3.5
=7