3-2 2/3:6•(1 1/2-3/5)=

3 - 2 2/3 : 6 · (1 1/2 - 3/5) = 2 целых 3/5

1) 1 1/2 - 3/5 = 1 5/10 - 6/10 = 15/10 - 6/10 = 9/10

2) 2 2/3 : 6 = 8/3 · 1/6 = (4·1)/(3·3) = 4/9

3) 4/9 · 9/10 = (2·1)/(1·5) = 2/5

4) 3 - 2/5 = 2 3/5 = 2,6 (в десятичных дробях)