Помогите 9 2/5-(8 1/3-7 1/4+5 1/6)

Question

Помогите 9 2/5-(8 1/3-7 1/4+5 1/6)

Comments

9 это 9 целых

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9 2/5-(8 1/3-7 1/4+5 1/6)= 3,15

Answer 1

9 2/5-(8 1/3-7 1/4+5 1/6)=3 3/20
1) 8 1/3-7 1/4=8 4/12-7 3/12=1 1/12
2) 1 1/12+5 1/6=1 1/12+5 2/12=6 3/12=6 1/4
3) 9 2/5-6 1/4=9 8/20-6 5/20=3 3/20

Comments

А почему?