Add and subtract money amounts

key notes :

Understanding Money

• Money consists of coins and bills, represented in dollars and cents.
• Use the decimal point to separate dollars and cents (e.g., $5.75 means 5 dollars and 75 cents).

Reading and Writing Money Amounts

• Practice reading money amounts correctly (e.g., $12.50 as “twelve dollars and fifty cents”).
• Write money amounts using symbols ($) and two decimal places.

Adding Money

• Line up decimal points when adding money amounts.
• Add digits in each place value (cents first, then dollars).
• Convert cents to dollars if the total cents exceed 99 (e.g., 125 cents = $1.25).

Subtracting Money

• Line up decimal points when subtracting money amounts.
• Subtract digits in each place value, borrowing if needed.
• Ensure the result is in proper money format.

Making Sense of Real-Life Scenarios

• Use addition for combining amounts (e.g., total cost of items).
• Use subtraction for finding change or comparing costs.

Word Problems

• Translate real-life scenarios into addition or subtraction equations.
• Solve step-by-step and double-check the decimal alignment.

Rounding and Estimation

• Round money amounts to the nearest dollar for quick estimation.
• Use estimation to verify answers are reasonable.

Learn with an example

let’s practice!