N 1026 help me. Please. Спасибо заранее

Question

N 1026 help me. Please. Спасибо заранее

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Answer 1

1) =(11-12:3):(21:7+5/2*1,6)=(11-4)/(3+2,5*1,6)=7/(3+4)=7/7=1

2) =25/5+7/3*3/2+0,5=5+21/6+0,5=5+3,5+0,5=9