Ms. Romo had $80 to purchase food for her students. She bought 32 bags of french fries and 35 hamburgers. Each hamburger cost $1.40, and each bag of french fires cost $0.56. How much money did Ms. Romo have left after these purchases?

13.08

Step-by-step explanation:

Answer & Step-by-step explanation:

Mathematical Problem Example :  100 x 105

By commutative rule, a x b = b x a : 100 x 105 = 105 x 100 = 10500

By distributive rule, a x (b+c) = (a x b)  + (a x c)

Breaking down 105, we get : 100 x 105 = 100 (100 + 5)

= (100 x 100) + (100 x 5) = 10000 + 500 = 10500

As solutions by both rules are same, algebra multiple ways to solve a mathematical problem have been hence proved.