问题标题:
能简算的要简算小六数学题!一.5/11×3/4+6/11÷4/3+0.75二.1/4÷(1-1/2-1/4)三.7/8×5/13+7/13×3/8四.(9又1/4-3.2)÷2又1/2+1.68
问题描述:

能简算的要简算小六数学题!

一.5/11×3/4+6/11÷4/3+0.75

二.1/4÷(1-1/2-1/4)

三.7/8×5/13+7/13×3/8

四.(9又1/4-3.2)÷2又1/2+1.68

曹克强回答:
  一.5/11×3/4+6/11÷4/3+0.75   =(5/11+6/11)*3/4+3/4   =3/4+3/4   =3/2   二.1/4÷(1-1/2-1/4)   =1/4÷1/4   =1   三.7/8×5/13+7/13×3/8   =7/8*(5/13+3/13)   =7/8*8/13   =7/13   四.(9又1/4-3.2)÷2又1/2+1.68   =(6+1/4-1/5)÷5/2+1.68   =121/20*2/5+1.68   =1.42+1.68   =3.1
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