4分之3×79加75%×21
问题描述：
4分之3×79加75%×21
答
=3/4×79+3/4×21
=3/4×（79+21)
=3/4×100
=75
4分之3×79加75%×21
=3/4×79+3/4×21
=3/4×（79+21)
=3/4×100
=75