Question

脱式计算。能简算的要简算。。。急。。。。注意：[ ]是中括号啊

8分之3×[9分之8÷（6分之5-4分之3）] 4÷5分之4-5分之4÷4 18分之7×4分之1+4分之3÷18分之7

Answer 1

8分之3×[9分之8÷（6分之5-4分之3）]
=3/8×[8/9÷(5/6-3/4)]
=3/8×8/9÷(5/6-3/4)
=1/3÷(5/6-3/4)
=1/3÷5/6-1/3÷3/4
=1/3÷6/5-1/3×4/3
=2/5-1/4
=8/20-5/20
=3/20
4÷5分之4-5分之4÷4
=4×5/4-4/5×1/4
=5-1/5
=24/5
18分之7×4分之1+4分之3÷18分之7
=7/18×1/4+3/4×18/7
=7/72+54/28
=7/72+162/72
=169/72