Помогите 668 !!!!!¡!!!!!!!!!!¡!!!!!!!!!!!!!!!!!!

Question

Помогите 668 !!!!!¡!!!!!!!!!!¡!!!!!!!!!!!!!!!!!!

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Answer 1

668.
1) 80:4=20
2) 10:10=1
3) 30:2=15
4) 20:5=4
5) 60:4*3=45
6) 90:5*3=54
7) 10:2*3=15
8) 50:5*6=60
9) 30:3*7=70