3*4分之1+8*11分之1+7*4分之3+9*11分之4=
问题描述:
3*4分之1+8*11分之1+7*4分之3+9*11分之4=
答
3×1/4+8×1/11+7×3/4+9×4/11
=3/4+8/11+21/4+103/11
=3/4+21/4+103/11+8/11
=24/4+111/11
=6+10又1/11
=16又1/11