Question

Mai received and spent money and the following ways last month. For each example write a sign number to represent the change in money from her perspective.


A. Her grandmother gave her $25 in a birthday card.


B. She earned $14 by babysitting.


C. She spent $10 on a ticket to a concert.


D. She donated three dollars to a local charity.


E. She got two dollar interest on money that was in her savings account

Answer 1

By knowing how to use positive numbers and negative numbers, we will see that the answers are:

• A)  C = $25
• B) C = $14
• C) C = -$10
• D) C = -$3
• E) C = $2

How to represent each change?

By standard notation, if May wins money, then we represent this with a positive number.

While if she pays or has a debt, we represent the change with a negative number (because now she has less money than before).

A) She receives $25, so the change is:

C = $25

B) She earns $14, so the change is:

C = $14

C) She spends $10, so now she has $10 less than before, the change is:

C = -$10

D) She donated $3, so the change is:

C = -$3

E) She gots $2, then the change is:

C = $2.

If you want to learn more about money changes, you can read:

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