List the Factors or Multiples
List all the factors of 18
1, 2, 3, 6, 9, 18
Say a prime number and explain why you know it is prime.
Examples will vary.
The equation 9 x 5 = 45 can mean...
a) 9 pencils and 5 pencils together are 45 pencils
b) 9 glue sticks divided into 5 groups is 45 glue sticks
c) 45 crayons are 9 times the 5 crayons at the table
d) The difference between 9 binders and 5 markers is 45
The correct answer is C.
45 crayons are 9 times the 5 crayons at the table
Ms. Rausch bought a soccer ball and a football. The football cost 2 times as much as the soccer ball. The soccer ball cost $13. How much did the football cost?
7 x ___ = 56
8
List all the factors for 27
1, 27
Say a composite number and explain how you know it is composite.
Examples will vary
Choose the two equations that best represent this situation:
Mrs. Lehfeldt picked 25 flowers. That was 5 times as many as her daughter, Sydney picked. How many flowers did Sydney pick? (In the equations below, f stands for Sydney's flowers.)
a) 25 × 5 = f
b) 25 =5 × f
c) 25 ÷ f = 5
d) 25 – 5 = f
The correct answers are B and C.
25 = 5 x f
25 ÷ f = 5
Mrs. DeGregorio bought a pokemon stuffie and a pack of pokemon cards. The stuffie $27. The pack of cards cost $9. How many times more than the cards did the stuffie cost?
3 times more!
____ x 9 = 54
6
List 4 multiples of 6.
6, 12, 18, 24, 30, etc.
Is 28 prime or composite? Explain.
Composite. 7 x 4 = 28 and 14 x 2 = 28
Mrs. DeGregorio's son is 7 years old. Her cousin is 4 times older than her son. Which equation represents how old her cousin is?
a) 7 - 4
b) 7 x 4
c) 7 ÷ 4
d) 7 + 4 + 4
The correct answer is B.
7 x 4 = 28
Her cousin is 28 years old.
Marcus is 18 years old. His grandma is 4 times older than him. How old is Marcus' grandma?
She is 72 years old.
30 x 3 =
90
List three multiples of 50.
50, 100, 150, 200, etc.
Is 63 prime or composite? Explain.
Composite. 9 x 7 = 63.
Mrs. Watts has 8 glue sticks at each of her table groups. There are 5 table groups in her classroom. Which two equations represent how many glue sticks Mrs. Watts has in all.
a) 8 x 5
b) 8 + 5
c) 8 ÷ 5
d) 5 x 8
The correct answer is A and D.
8 x 5
5 x 8
There are 3 students in the purple group. They each brought 4 packs of paper to school. The class needs 5 times as much paper as the entire purple group brought to last the whole year. How many packs of paper does the class need?
(3 x 4) x 5 = 60
10
List all the factors for 56
1, 2, 7, 8, 28, 56
Is 36 prime or composite?
Composite. 6 x 6 = 36 and 9 x 4 = 36
Mrs. Rallison buys 6 toys a day. How many toys does she collect in a week? Which equation represents how many toys she collects in a week?
a) 7 ÷ 6
b) 6 + 7
c) 6 x 7
d) (6 x 7) + (6 x 7)
The correct answer is A.
6 x 7
Mrs. Lehfeldt's orange table group has 4 students, and each student brought 5 pencils. The blue table group has 6 students, and each student brought 5 pencils. After they collected the pencils, Mrs. Lehfeldt divided them evenly among the students at those two tables. How many pencils did each student get?
(4 x 5) + (6 x 5) = 50
50 ÷ 10 = 5 pencils each!
20 x ____ = 100
5