Money amounts are represented in dollars and cents, including decimals to the hundredths, and related quantities in a situation are interpreted to determine two connected operations, such as finding a total and then calculating change. The solver represents the relationships with equations, bar models, or number lines, keeps track of the meaning of the intermediate result, and checks whether the answer is reasonable; work is limited to familiar whole-number operations and addition or subtraction of money, not decimal multiplication or division, rates, percentages, or multi-step financial formulas.
When a money problem asks for two connected things, solve one part first and use that answer in the second part.
Example:
Maya buys a juice for 1.35$2.50$5.00$. How much change does she get?
1. Find the total cost.
Add the prices. Line up the decimal points:
The total cost is 3.85$.
2. Find the change.
Subtract the total cost from the amount Maya paid:
Maya gets 1.15}$ in change.
3. Check your answer.
Add the cost and the change:
This matches the amount Maya paid, so the answer is reasonable.
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