2. Place value can help you understand and write and compare decimal numbers. Subtracting Decimals

4. Example: Sports Application How many more points did Carly need on the vault to have a perfect score of 10? 10.0 –9.3 0.7 Align the decimal points.Use zeros as placeholders.Subtract. Then place the decimal point. Carly needed another 0.7 of a point to have a perfect score. Find the difference between 10 and 9.3. Subtracting Decimals

5. Check It Out How many more points did Carly need on the uneven bars to have a perfect score of 10? 10.00 –9.45 0.55 Align the decimal points.Use zeros as placeholders.Subtract. Then place the decimal point. Carly needed another 0.55 of a point to have a perfect score. Find the difference between 10 and 9.45. Subtracting Decimals

6. Example: Using Mental Math to Subtract Decimals Find each difference. 4 – 0.7 4 – 0.7 = 3.3 Think: 0.7 + 0.3 = 1, so 1 – 0.7 = 0.3. Subtracting Decimals

7. Check It Out Find the difference. 6 – 0.3 6 – 0.3 = 5.7 Think: 0.3 + 0.7 = 1, so 1 – 0.3 = 0.7. Subtracting Decimals

8. You can place any number of zeros at the end of a decimal number without changing its value. Helpful Hint Subtracting Decimals

9. Identify the difference. 12.6 – 6 A. 5 B. 5.6 C. 6 D. 6.6 Student Response Systems Subtracting Decimals