Adding and Subtracting Money Using Mental Math

This video tutorial teaches how to add and subtract money using mental math. It covers skip counting techniques to find total amounts and calculate change. The lesson addresses common misunderstandings about change and provides examples with Reggie, Raji, and Whitney to illustrate different methods of calculating change. The tutorial concludes with a summary of the key concepts learned.

What is the main concept of change in a transaction?

• The amount of money left after buying multiple items.

• The sum of the cost and the amount given.

• The difference between the cost and the amount given.

• The total amount of money you have.

If Reggie has $0.50 and the soda costs $0.40, how much change will he receive?

• $0.05

• $0.10

• $0.20

• $0.15

Raji starts with $0.25 and finds two dimes. How much does he have now?

• $0.35

• $0.45

• $0.55

• $0.65

Whitney pays $0.50 for lemonade costing $0.35. What is her change?

• $0.10

• $0.25

• $0.15

• $0.20

What two coins make up the $0.15 change Whitney receives?

• Two dimes

• Three nickels

• One dime and one nickel

• One quarter