Add and subtract money amounts

Key Notes :

Understanding Money:

• Money is represented in different denominations (coins and bills).
• For example: coins in cents (1¢, 5¢, 10¢, 25¢, 50¢, 1 dollar) and bills (1, 5, 10, 20, 50, 100).
• Important to understand how to convert between cents and dollars: 100 cents = 1 dollar.

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Adding Money:

• Align the decimal points (dollars and cents) when adding money.
• Start from the rightmost column (cents) and move left, just like adding regular numbers.
• Example:
  $3.75 + $4.50 = $8.25
  Add cents first (75 + 50 = 125), which equals 1 dollar and 25 cents. Write 25 cents and carry over 1 dollar. Then, add the dollars (3 + 4 + 1 carried over = 8).

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Subtracting Money:

• Similar to addition, align the decimal points when subtracting.
• Start from the right (cents), borrow if needed (just like subtraction with larger numbers).
• Example:
  $6.50 – $2.75 = $3.75
  Subtract cents first (50 – 75 is not possible, so borrow 1 dollar = 100 cents). Then subtract (150 – 75 = 75 cents). Finally, subtract dollars (6 – 2 = 4).

Learn with an example

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