Question

3/5 : (-3 11/15) : (-7/60) * 1 2/3 =
я решила 2 дествия , а третье не могу
9 2/7 * 3 8/15 +1 7/15 * 9 2/7 - 6 2/7 * 5= помогите

Answer 1

3/5 : (-3 11/15) : (-7/60) * 1 2/3 = 3/5 : (-56/15) : (-7/60) * 5/3 = 
=3/5 : 56/15 : 7/60 * 5/3 = 1 : 56/15 : 7/60 * 1 = 1*15/56*60/7=15/14*15/7=
=225/98=2 29/98


9 2/7 * 3 8/15 +1 7/15 * 9 2/7 - 6 2/7 * 5= 9 2/7 * (3 8/15 +1 7/15 )- 6 2/7 * 5=
 = 9 2/7 * (4 15/15)- 6 2/7 * 5= 9 2/7 * 5- 6 2/7 * 5=5*(9 2/7 - 6 2/7)=5*3=15