Помогите !!!!!!!!!!!!

Question

Помогите
!!!!!!!!!!!!

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Answer 1

1. 7/8*24-1/6*24=7*3-4=17
2. (3+9)*1/3=3*1/3+9*1/3=1+3=4
3. (7-3/4)*1/3=7/3-3/4*1/3=7/3-1/4=(28-3)/12=25/12=2 1/12
4. (1/7+2)*7/9=1/7*7/9+2*7/9=1/9+14/9=15/9=5/3=1 2/3