Вычеслите (1/3-1/5)*30-(2.1/3-1.2/7*7/9)*9/5

Question

Вычеслите (1/3-1/5)*30-(2.1/3-1.2/7*7/9)*9/5

Answer 1

1)1/3-1/5=(5-3)/15=2/15
2)2/15*30=4
3)1 2/7*7/9=9/7*7/9=1
4)2 1/3-1=1 1/3
5)1 1/3*9/5=4/3*9/5=12/5
6)12/5*9/5=108/25=4,32
7)4-4,32=-0,32