Multiplication as a Comparison
When you multiply, does the order of the factors matter?
No, the order of the factor does not matter. 6x2 or 2x6 give the same product
Jenelle's Market sells bags of 8 oranges. Simone needs 5 times that amount. Write and solve an equation to find the number of oranges that Simone needs.
5x8=40
Simone needs 40 oranges
What does prime and composite mean?
Prime means the number only has one factor pair (itself and 1)
Composite means the number has more than 1 factor pair
Linda puts 32 cupcakes into containers. She puts the same number of cupcakes into each container. Which list shows all of the possible numbers of cupcakes that Linda can put into each container?
a. 1, 2, 4
b. 1, 2, 4, 8, 16, 32
c. 1, 2, 16, 32
d. 4, 8 ,16 ,32
What is a factor?
A factor is a number that you can multiply with another to get a product
In the problem, 36 is 4 times as many as 9, which number goes in the bar model, and how many times do you write it?
9 goes in the bar model and you repeat it 4 times.
Write a division equation for the numbers 5, 4, 20
20 / 4 = 5
20 / 5 = 4
How is 20 a multiple of 5?
20 is the product of 4 and 5. 5 x 4 = 20. Also, if you count by 5's you get to 20: 0, 5, 10, 15, 20
Decide if each number is prime or composite:
10
7
21
37
2
18
10 Composite
7 prime
21 Composite
37 Prime
2 Prime
18 Composite
What is an array?
a way to arrange objects or numbers in equal rows and columns
Write this as a sentence: 7x5 = 35
7 times as many as 5 is 35
Monique and Wint read the same book. Monique reads 63 pages one weekend. She reads 7 times as many pages as Wint. Write and equation with an unknown to find the number of pages Wint reads. Thens solve the equation.
63 = 7 x ?
63 / 7 = ?
? = 9
Wint reads 9 pages
Leona has 7 cups of oats. She needs 2 cups of oats for one full batch of cookies. Can she use all of her oats to make multiple full batches of cookies?
No, Leona can only make 3 full batches leaving her with 1 extra cup not enough for another full batch.
Which comparison describe the equation 8 x 4 = 32
a. 32 is 4 times as many as 8
b. 4 times as many as 32 is 8
c. 8 is 4 times as many as 32
d. 8 times as many as 4 is 32
a, d, e
5 x 7 = 35
What does the number 5 and 7 represent?
a factor
Which comparisons describe the equation 6x8 = 48?
a. 48 is 8 times as many as 6
b. 48 is 6 times as many as 8
c. 8 times as many as 48 is 6
d. 6 times as many as 8 is 48
e. 6 is 8 times as many as 48
a b and d
Christina reads 7 pages in a magazine. She reads 5 times as many pages in a book. How many pages does Christina read altogether? Show your work.
7 x 5 = 35
35 + 7 = 42
They read 42 pages all together
List all the factors of the number 36
1, 2, 3, 4, 6, 9, 12, 18, 36
Vildia arranges cards fora. games into 3 rows of 12 cards. What are two other ways she can arrange the cards so that there are the same number of cards in each row?
3 x 12
2 x 18
4 x 9
What does the term "times as many" mean as a symbol?
x
Sergio found 4 pennies on the ground. His sister said she found 2 times as many pennies. Sergio figured out that his sister found 6 pennies. What did Sergio do wrong?
He added 4 and 2 instead of multiplying 4 by 2
Maria has 32 post cards. Henry has h postcards. Maria has 4 times as many post cards as Henry. Select all the correct statements.
a. The number of postcards Henry has can be represented by the expression 32 / 4
b. Henry has 6 post cards
c. The number of postcards Henry has can be found by solving the equation 32 = 4 x h
d. Henry has 8 postcards
e. The number of postcards Henry has can be represented by the expression 32 x 4
a, c and d
List the first 5 multiples of 7
7, 14, 21, 28, 35
What do all of the numbers below have in common?
8, 16, 24, 32, 40
a. they are factors of 8
b. They are multiples of 12
c. They have 8 as a factor
d. They are multiples of 8
e. They are multiples of 6
c and d
what does the word "is" represent as a symbol?
=