1. Splash Screen

2. Five-Minute Check (over Lesson 9–7) Main Idea
Example 1: Problem-Solving Investigation
Lesson Menu

3. I will choose the best strategy to solve a problem.
Main Idea/Vocabulary

4. YOUR MISSION: How many goldfish did each girl take home?
MYKAELA: My science teacher is giving goldfish to some of my classmates to take care of during the summer. He gave some of them to Gisela. Then he gave twice as many to Liseta. He gave twice as many to Clara as he gave to Liseta. He gave out all 28 goldfish.
YOUR MISSION: How many goldfish did each girl take home?
Example 1

5. Understand What facts do you know? There are 28 goldfish.
He gave some to Gisela.
He gave twice as many to Liseta as to Gisela.
He gave twice as many to Clara as to Liseta.
Example 1

6. Understand What do you need to find?
You need to determine how many goldfish each girl took home.
Example 1

7. Plan
You can use the guess and check strategy to find how many goldfish each girl took home.
Example 1

8. Solve
Make a guess as to how many goldfish the teacher gave Gisela. See if it is correct. Then adjust the guess, if necessary. 5
2 × 5 = 10
2 × 10 = 20 35
35 > 28; too many 3
2 × 3 = 6
2 × 6 = 12 21
21 < 28; too few 4
2 × 4 = 8
2 × 8 = 16 28
28 = 28; correct
Example 1

9. Solve
Answer: So, the teacher gave 4 goldfish to Gisela, 8 goldfish to Liseta, and 16 goldfish to Clara.
Example 1

10. Check
Look back at the problem = 28 So, the answer is correct.
Example 1

11. End of the Lesson
End Lesson

12. Five-Minute Check (over Lesson 9–7) Image Bank Math Tool Chest
Compare Fractions
Resources

13. List multiples to find the first two common multiples of 6 and 8
(over Lesson 9–7)
List multiples to find the first two common multiples of 6 and 8
24, 48
30, 42
24, 42
36, 64 A B C D
Five Minute Check 1

14. List multiples to find the first two common multiples of 5 and 7.
(over Lesson 9–7)
List multiples to find the first two common multiples of 5 and 7.
15, 14
35, 70
30, 49
45, 63 A B C D
Five Minute Check 2

15. Find the LCM of 8 and 12. 16 32 24 36 (over Lesson 9–7) A B C D
Five Minute Check 3

16. Find the LCM of 9 and 15. 18 30 45 75 (over Lesson 9–7) A B C D
Five Minute Check 4

17. End of Custom Shows