Question

 

(1,75*3 2/3+1/3*1,75):0,1*4/7-21 1/3

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0,4*4 5/6*2,5-9:(5 4/5*0,1+1,42)

Answer 1

1) 1,75*3 2/3= 7/4*11/3=77/12
2) 1/3*1,75=1/3*7/4=7/12
3)  77/12+7/12= 84/12=7
4) 7:0,1=70
5) 70*4/7=40
6) 40-21 1/3=18 2/3