Apply decimal skills to real-world money problems and currency conversion. Master money calculations with shopping, change making, and financial literacy.
Scenario: You're at a store with $10.00 and want to buy items that cost $3.75. How much change will you get back? What if you buy two items: one for $2.50 and another for $4.25? Can you afford both with your $10.00?
This is where decimal skills meet real-world money problems! Understanding how decimals work with money helps you make smart shopping decisions and manage your finances.
Money uses decimals where the dollar is the whole number part and cents are the decimal part (hundredths).
To make change, subtract the cost from the amount paid. Use decimal subtraction skills to calculate the difference.
Paid: $5.00
Cost: $3.75
Change: $1.25
Money amounts are written as decimals where the dollar sign represents the decimal point. $3.75 means 3 dollars and 75 cents.
Example: $3.75 = 3 dollars + 75 cents = 375 cents total
Add money amounts just like adding decimals. Align the decimal points and add each place value.
Example: $2.50 + $4.25 = $6.75 (2 + 4 = 6 dollars, 50 + 25 = 75 cents)
To make change, subtract the cost from the amount paid. Use decimal subtraction with proper alignment.
Example: $10.00 - $3.75 = $6.25 (10 dollars - 3 dollars = 7 dollars, but we need to borrow)
You have $20.00. Can you afford these items?
Calculate change for these purchases:
1. $2.50 + $1.75 = ?
2. $5.25 + $3.80 = ?
3. $8.95 + $4.50 = ?
4. $12.75 + $6.25 = ?
5. Paid: $10.00, Cost: $7.25, Change: ?
6. Paid: $20.00, Cost: $15.50, Change: ?
7. Paid: $5.00, Cost: $2.85, Change: ?
8. Paid: $50.00, Cost: $32.75, Change: ?
9. Convert 325 cents to dollars
10. Convert $4.75 to cents
11. Budget: $25.00, Spent: $18.50, Remaining: ?
12. Tip: 15% of $12.00 = ?
Wrong: $3.75 = 375 dollars (confusing cents with dollars)
Correct: $3.75 = 3 dollars and 75 cents = 375 cents total
Wrong: Writing 3.75 instead of $3.75
Correct: Always include the dollar sign when writing money amounts
Money amounts are written as decimals with dollar signs
1 dollar = 100 cents, so $1.00 = 100 cents
Use decimal addition and subtraction skills for money calculations
Always include the dollar sign when writing money amounts