Question

Robby goes to the supermarket to buy a bag of chips. He brings $20 to the store and pays $3.79 for the chips. On the way home, he finds $1.35 in coins on the sidewalk. How much money does Robby have when he gets home?

Answer 1

Your answer is $17.56.

Answer 2

you must subtract to obtain the quantity that Robby has when he has  bough  the chips ,20- 3.79 =   $ 16,21 but when he return to home he finds $ 1.35, then he has $ 1.35 + $ 16,21 =  $17,56