Mary has 26 blue shirts and 36 brown shirts. If she gives away half of her blue shirts and a third of her brown shirts, how many shirts does she have left?
Mary gives away 26/2 = <T>divide(26, 2)=13.0 blue shirts.
Mary gives away 36/3 = <T>divide(36, 3)=12.0 brown shirts.
Mary has 26-13 = <T>subtract(26, 13)=13 blue shirts left.
Mary has 36-12 = <T>subtract(36, 12)=24 brown shirts left.
Mary has 13+24 = <T>add(13, 24)=37 shirts left.
