Question

Louis wants to give \$15 to help kids who need school supplies. He also wants to buy a pair of shoes for \$39.

How much money will he have to save for both?

Answer 1

Louis needs to save 15+39 = $ 54 dollars

Explanation:

\begin{aligned} 15 + 39 &=& \\ 10 + 5 + 30 + 9 &=&\\ 10 + 30 + 5 + 9 &=&\\ 40 + 10 + 4 &=&\\ 54. \end{aligned}

So Louis needs to save \$54.