1. Multiplying Decimals

2. Vocabulary
Product –the answer to multiplying two or more numbers.

3. 0.7 x 0.4 To model multiplication: Go across the top Then, go down
Area that overlaps represents the answer

4. 0.7 x 0.4

5. 0.7 x 0.4

6. 0.7 x 0.4

7. 0.2 x 0.6

8. 0.2 x 0.6

9. 0.2 x 0.6

10. Try This…
Sample Problem #1

11. What to do? Step 1: Line up the numbers as if there were no decimals
Step 1b: DO NOT add ‘0’ as place holders

12. What to do?
Step 2: multiply as if you had whole numbers

13. What to do?
Step 3: count the number of decimal places in each number

14. What to do?
Sample Problem #2:
Step 4: the total will be how many decimal places are in your answer

15. Example
2 Decimal places
+ 1 Decimal place
3 Decimal places

16. Practice
0.8 x 2

17. Practice
5.06 x 7

18. Practice
1.7 x 2.3

19. Practice
2.38 x 0.4

20. Practice
Charlie hikes for 1.25 hours at an average speed of 2.6 miles per hour. How many miles does Charlie hike?