(1/2+1/5) : 2 - 3/10

Question

(1/2+1/5) : 2 - 3/10

Answer 1

(1/2+1/5) : 2 - 3/10=(5/10+2/10) :2 - 3/10=7/10 :2-3/10=7/20-3/10=7/20-6/20=1/20

Answer 2

(1/2+1/5) : 2 - 3/10= (5/10 + 2/10) : 2 - 3/10= 7*2/10 - 3/10= 7/5 - 3/10= 14/10 - 3/10= 11/10 = 1 целая 1/10