Brittney can chop 15 onions in 5 minutes. Carl can chop 20 onions within that same time. How many more onions can Carl chop in 30 minutes than Brittney?
Brittney can chop 15/5 = <T>divide(15, 5)=3.0 onions in one minute.
Carl can chop 20/5 = <T>divide(20, 5)=4.0 onions in one minute.
Brittney can chop 3 x 30 = <T>multiply(3, 30)=90 onions in 30 minutes.
Carl can chop 4 x 30 = <T>multiply(4, 30)=120 onions in 30 minutes.
Carl can chop 120 - 90 = <T>subtract(120, 90)=30 more onions than Brittney in 30 minutes.
