1. Splash Screen

2. Five-Minute Check (over Lesson 12–1) Main Idea
Example 1: Problem-Solving Skill
Lesson Menu

3. I will solve problems by determining reasonable answers.
Main Idea/Vocabulary

4. Juanita is trimming the hedges
Juanita is trimming the hedges. They are 37 meters from the electrical outlet. Her extension cord is 3,500 centimeters long. Juanita estimates that the extension cord is long enough to reach the hedges. Is she correct? If not, how much longer does an extension cord need to be to reach the hedges?
Example 1

5. Understand What facts do you know?
The distance from the hedges to the electrical outlet.
The length of the extension cord in centimeters.
What do you need to find?
Does Juanita have a long enough extension cord?
Example 1

6. Plan
Convert 3,500 centimeters to meters. Then compare.
Example 1

7. Solve First, convert 3,500 centimeters to meters.
3,500 centimeters = meters
3,500 ÷ 100 = 35
So, 3,500 centimeters = 35 meters.
Since 35 < 37 meters, Juanita’s extension cord will not be long enough to reach the hedges.
Example 1

8. Solve
To find how much longer the extension cord needs to be, subtract.
37 – 35 = 2
Answer: So, Juanita will need an extension cord that is 2 meters or 200 centimeters longer to reach the hedges.
Example 1

9. Check
Look back at the problem. Since 3,700 > 3,500 and 3,700 – 3,500 = 200, the answer is reasonable.
Example 1

10. End of the Lesson
End Lesson

11. Five-Minute Check (over Lesson 12–1) Image Bank Math Tool Chest
Metric Rulers
Resources

12. Complete. 5 m = cm 125 300 500 550 (over Lesson 12–1) A B C D
Five Minute Check 1

13. Complete. 2 km = m 1,000 2,000 3,000 4,000 (over Lesson 12–1) A B C D
Five Minute Check 2

14. Complete. 30 mm = cm 3 4 5 6 (over Lesson 12–1) A B C D
Five Minute Check 3

15. Complete. 6,000 m = km 12 8 6 4 (over Lesson 12–1) A B C D
Five Minute Check 4

16. Complete. 4 m = mm 1,000 2,000 3,000 4,000 (over Lesson 12–1) A B C D
Five Minute Check 5

17. Complete. 1 km = cm 1,500 25,000 100,000 125,000 (over Lesson 12–1) AB C D
Five Minute Check 6

18. End of Custom Shows