1. Splash Screen

2. Five-Minute Check (over Lesson 10–5) Main Idea
Example 1: Estimate Sums
Example 2: Estimate Differences
Example 3: Real-World Example
Example 4: Real-World Example
Lesson Menu

3. I will estimate sums and differences of mixed numbers.
Main Idea/Vocabulary

4. Estimate Sums Estimate 2 + 3 . 2 4 6 3 1 6 + Estimate 3 + 3 = 6
Answer: So, is about 6. 4 6 1
Example 1

5. Estimate 2 3 1 5 4 5 6 7 A B C D
Example 1

6. Estimate Differences Estimate 8 – 3 . 8 3 3 7 8 – Estimate 8 – 4 = 4
Answer: So, 8 – 3 is about 4. 3 8 7
Example 2

7. Estimate 9 – 6 . 7 8 1 4 5 6 7 A B C D
Example 2

8. Round each mixed number to the nearest whole number. Then add.
Javier walked miles on Saturday and miles on Sunday. About how many miles did he walk in all? 6 10 7
Round each mixed number to the nearest whole number. Then add.
Example 3

9. Answer: So, Javier walked about 5 miles.2 6 10 1 7 +
Estimate = 5
Answer: So, Javier walked about 5 miles.
Example 3

10. Clairese walked for 1 hours on Friday and 2 hours on Sunday
Clairese walked for 1 hours on Friday and hours on Sunday. About how many hours did she walk in all? 4 5 1
about 1 hour
about 2 hours
about 3 hours
about 4 hours A B C D
Example 3

11. A punch recipe calls for 9 cups of juice
A punch recipe calls for 9 cups of juice. Angie has used 6 cups of juice in the mixture. About how much more juice does Angie need to finish making the punch? 2 3 6
Round 9 to 10 and 6 to 6. 2 3 6
Estimate 10 – 6 = 4.
Answer: So, about 4 more cups of juice are needed to finish making the punch.
Example 4

12. A recipe calls for 8 cups of water
A recipe calls for 8 cups of water. If only cups has been added in so far, about how much more is needed? 1 7 5 6
about 2 cups
about 3 cups
about 4 cups
about 5 cups A B C D
Example 4

13. End of the Lesson
End Lesson

14. Five-Minute Check (over Lesson 10–5) Image Bank Math Tool Chest
Add Like Fractions
Resources

15. (over Lesson 10–5)
Solve. Determine which answer is reasonable. Ali bought lunch at a restaurant. She spent $5.75 for a sandwich, $1.99 for a cup of soup, and $1.29 for milk. Which is a more reasonable estimate for the amount of money Ali spent on lunch?
$10.00
$11.00
$9.00
$8.00 A B C D
Five Minute Check 1

16. End of Custom Shows