2又5分之1×0.75+2.2×4分之1=?(用简便方法)急~··
问题描述:
2又5分之1×0.75+2.2×4分之1=?(用简便方法)急~··
答
2又5分之1×0.75+2.2×4分之1
=2.2×0.75+2.2×0.25
=2.2×(0.75+0.25)
=2.2×1
=2.2