Prime & Composite
Prime or Composite?
16
Composite
Name all the factors of 11.
1 and 11
Which multiplication model uses rows and columns?
Array
Ms. Delonna had 36 books.
She evenly distributed the books to 4 students.
How many books did each student receive?
Write an equation and solve.
36 / 4 = 9
36 divided by 4 = 9
Each student received 9 books.
Joy has $25. She has 5 times as much money as her sister Dawn. How much money does Dawn have?
Write and equation and solve.
25 = 5 x D
25 divided by D = 5
Dawn has $5.
Prime or Composite?
33
Composite
Name three multiples of 8.
8, 16, 24, 32, 40, 48, 56, 64, 72, 80, etc.
8 x 7
56
Mrs. Carter had two boxes of 8 crayons.
A student brought in one more box of 8 crayons.
How many total crayons does Mrs. Carter have?
Write an equation and solve.
(2 x 8) + 8
8 + 8 + 8
16 + 8
Mrs. Carter has 24 crayons.
The equation 6 x 8 = 48 can mean:
a) 48 pencils are 6 pencils less than 8 pencils
b) 48 pencils are 6 times as many as 8 pencils
c) 48 pencils are 6 and 8 pencils put together
b) 48 pencils are 6 times as many as 8 pencils
What makes the number 2 special?
It is the only even number that is prime.
Vince says that 9 is a prime number because it only has two factors. Is he correct?
No, he is incorrect.
9 has three factors- 1,3 and 9.
A box has 72 crayons. They are split into 6 rows. How many crayons are in each row?
There are 12 crayons in each row.
Cody bought two bags of 5 apples.
If he already has one bag of 5 apples at home, how many apples will he have altogether?
Write an equation and solve.
(2 x 5) + 5
5 + 5 + 5
10 + 5
Cody has 15 apples.
James bought a new cat toys and some treats. The cat toys cost $27. The treats cost $9. How many more times more did the toys cost than the treats?
Write an equation and solve.
The cat toys cost 3 times more than the treats.
How many factors does a prime number have?
Two, 1 and itself.
(1 Factor Pair)
Jillian says that 24 has eight factors. Is she correct?
Yes, she is correct.
1,2,3,4,6,8,12 and 24
Which multiplication strategy compares two rates?
Ratio Table
Charles is setting up chairs in the auditorium.
The first two rows have 12 chairs.
The third and fourth rows have 24 chairs.
The fifth and sixth rows have 36 chairs.
How many chairs will be in the eighth row?
The eighth row will have 48 chairs.
Josey is 48 inches tall. The mailman is 3 times as tall as Josey. How tall is the mailman?
Write an equation and solve.
The mailman is 144 inches tall.
Prime or Composite?
97
Prime
Name the next three multiples:
14, 28, 42, ___, ___, ____
56, 70, 84
If Mr. Beast gave out $500 a month for 5 years, how much money would he have given away?
$30,000
Delia has $10.
Sylvia has twice as much money as Delia.
Brigid has double the amount of money Delia and Sylvia have combined.
How much money does Brigid have?
Delia = 10
Sylvia = 2 x 10 = 20
Brigid = 2 x (10 + 20) = 60
Brigid has $60.
Four teachers have 8 students. The school has five times as many students as the four teachers. How many students does the school have?
Write an equation and solve.
5 x (4 x 8) or 5 x 32
The school has 160 students.