Amanda needs 12 more marbles to have twice as many marbles as Katrina, and Mabel has 5 times as many marbles as Katrina. If Mabel has 85 marbles, how many more marbles does Mabel have than Amanda?
Katrina has 85/5 = <T>divide(85, 5)=17.0 marbles.
Twice as many marbles as Katrina is 17 x 2 = <T>multiply(17, 2)=34
Amanda has 34 -12 = <T>subtract(34, 12)=22 marbles.
Mabel has 85 - 22 = <T>subtract(85, 22)=63 more marbles than Amanda
