Question

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

Answer 1

(2 3/5 - 1 7/10)+(11/2-7/20)=(2 6/10 - 1 7/10)+(5 10/20 - 7/20)= 9/10+5 3/10= 6 2/10=6 1/5