Question

Melinda earned $8.10 babysitting her neighbors' toddler. She spent $6.50 to go see a movie.

Which set of expressions can be used to represent Melinda's situation?
8.10-6.50 and 8.10 + (-6.50)
O 8.10 -6.50 and 8.10 - (-6.50)
O 8.10 +6.50 and 8.10 -(-6.50)
O 8.10 +6.50 and 8.10 + (-6.50)

Answer 1

8.10-6.50 and 8.10 + (-6.50)

Explanation:

Since Melinda has $8.10, that will be the number that is subtracted from when she spends $6.50 to go see a movie. so 8.10 - 6.50

The expression 8.10 + (-6.50) is the same thing as 8.10 - 6.50 because adding a negative number is the same thing as subtracting.