1. Decimal Operations Objective: To solve decimal problems correctly by using the correct place values.

2. A helpful way to remember addition and subtraction with decimals…

3. Placeholders Place Value

4. 3 8. 1 + 4. 2 4 4 2. 3 4 Line up decimal places What do we put here? Evaluate:38.1 + 4.24 0

5. 1. 2 1 +. 4 7 6 1. 6 8 6 Line up decimal places What do we put here? Evaluate:1.21 +.476 0

6. 7. 5 2 + 3. 4 * 1 0. 9 2 Line up decimal places What do we put here? Evaluate:7.52 + 3.4 0

7. 4 5. 8 - 1 2. 3 2 3 3. 4 8 Line up decimal places What do we put here? Evaluate:45.8 – 12.32 0 7 1

8. 7 2. 9 - 5 1. 4 8 2 1. 4 2 Line up decimal places What do we put here? Evaluate:72.9 – 51.48 0 8 1

9. 9 8. 6 - 6 7. 4 3 3 1. 1 7 Line up decimal places What do we put here? Evaluate:98.6 – 67.43 0 5 1

10. How do we write the following dollar amounts with a decimal? $5$12 $24$99 $5.00 $12.00 $24.00 $99.00 If you have a whole number where is the decimal located?

11. 61. 0 +. 4 61. 4 Line up decimal places where’s the decimal? Evaluate:61 +.4

12. 2 7. 3 + 1 0. 0 3 7. 3 Line up decimal places where’s the decimal? Evaluate:27.3 + 10

13. 2 3. 0 + 5. 6 2 8. 6 Line up decimal places where’s the decimal? Evaluate:23 + 5.6

14. 4 3. 7 + 2 4. 0 6 7. 7 Line up decimal places where’s the decimal? Evaluate:43.7 + 24