5. 7/15 - ( 7. 1/12-(4. 29/60-(2. 1/5-1. 5/6)))

Question

5. 7/15 - ( 7. 1/12-(4. 29/60-(2. 1/5-1. 5/6)))

Comments

там не 17 пунктов

Answer 1

1) 2. 1/5-1. 5/6=2. 1/5+1. 5/6=2. 6/30+1. 25/30=4. 1/30
2) 4.29/60-4.1/30=4.29/60-4.2/60=27/60
3) 7.1/12+27/60=7.5/60+27/60=7.32/60=7.8/15
4) 5.7/15-7.8/15=-(7.8/15-5.7/15)=-2.1/15