Splash Screen. Lesson Menu Five-Minute Check (over Lesson 9–1) Main Idea and Vocabulary Example...
-
Upload
bernadette-berry -
Category
Documents
-
view
214 -
download
0
Transcript of Splash Screen. Lesson Menu Five-Minute Check (over Lesson 9–1) Main Idea and Vocabulary Example...
Five-Minute Check (over Lesson 9–1)
Main Idea and Vocabulary
Example 1:Use Models
Example 2:Use Factor Pairs
Example 3:Find the Prime Factorization of a Number
• I will identify prime and composite numbers.
• prime factorization
Use Models
Tell whether the number 14 represented by the model is prime or composite.
The model shows 2 rows of 7 squares. The squares could also be arranged in 7 rows of 2 squares, 14 rows of 1 square, or 1 row of 14 squares, as shown below.
Answer: So, the number 14 is a composite number because it has more than 2 factors.
Tell whether the number 8 represented by the model is prime or composite.
1. A
2. B
0%0%
A. prime
B. composite
Use Factor Pairs
19 square tables are to be placed together to form a rectangle. Is 19 a prime or composite number? What does it mean in this problem?
factors of 19: 1, 19
Answer: Since the number 19 only has two factors, it is a prime number. This means there is only one way to place the tables.
1. A
2. B
A. prime
B. composite
24 tables are to be placed together to form a rectangle. Is 24 a prime or composite number?
0%0%
Find the Prime Factorization of a Number
Find the prime factorization of 54.
54
2 × 27
2 × 3 × 9
2 × 3 × 3 × 3
54
3 × 18
3 × 3 × 6
3 × 3 × 3 × 2
Answer: In order, the prime factorization of 54 is 2 × 3 × 3 × 3.
1. A
2. B
3. C
4. D0% 0%0%0%
A. 2 × 3 × 3
B. 2 × 2 × 3 × 9
C. 3 × 3 × 3 × 3
D. 9 × 9
Which shows the prime factorization of 81?
End of the Lesson
Five-Minute Check (over Lesson 9–1)
Image Bank
Math Tool Chest
Compare Fractions
1. A
2. B
3. C
4. D0% 0%0%0%
(over Lesson 9–1)
A. 1, 2, 3, 6, 9
B. 1, 2, 3, 4, 6, 9
C. 1, 2, 3, 6
D. 6, 9
Find the common factors of 12 and 18.
1. A
2. B
3. C
4. D0% 0%0%0%
(over Lesson 9–1)
A. 1, 2, 4
B. 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14
C. 1, 2, 3, 4, 6, 12, 14
D. 2, 4
Find the common factors of 20, 24, and 28.
1. A
2. B
3. C
4. D0% 0%0%0%
(over Lesson 9–1)
A. 4
B. 5
C. 3, 5
D. 1, 5
Find the GCF of 15 and 20.
1. A
2. B
3. C
4. D0% 0%0%0%
(over Lesson 9–1)
A. 1, 3, 4, 6, 7
B. 3
C. 1, 7
D. 7
Find the GCF of 21, 28, and 35.