Question

помогите с 869 (а)  (34 + 16)*3+(56-12)/29 ,870 (а )(715+730+45)/(2-13-1/2),871 (а)

Answer 1

3/4+1/6):3+(5/6-1/2):9=3   1/12

 

1)3/4+1/6=9+2/12=11/12:3/1=2  3/4

5/6-1/2=5-3/6=2/6=1/3:9/1=1/3

2  3/4+1/3=3  1/12

 2)(7/15+7/30+4/5)/(2-1/3 -1/2)=(45/30)/(7/6)=9/6×6/7=9/7