Factors, Multiples, Prime or Composite
Give an example of a prime number and explain why it is prime.
5 is a prime number because it only has two factors, 1 and itself.
Write the equation that fits this statement:
45 crayons are five times the 9 crayons at the blue table
5 x 9 = 45
Abram bought a shirt and some pants. The pants cost 3 times as much as the shirt. The shirt was $14. How much did the pants cost? Equation, work, answer with label.
14 x 3 = 42
The pants cost $42
____ x 9 = 45
5
100 x 10=
1,000
Give an example of a composite number and explain why it is comopsite.
Write an equation for this statement:
Zoe picked 21 flowers. That is three times as many as her little sister had picked.
21 = 3 x f
OR
21 / f = 3
Daniel bought a video game and a DVD. The video game cost $24. The dvd cost $8. How many times more than the DVD did the video game cost? Work, equation, and answer with label.
____ x 8 =24
3 x 8= 24
The game cost 3 times more than the dvd.
8 x 6 =
48
300 - 98=
202
What are the factors of 24?
1, 2, 3, 4, 6, 8, 12, 24
____ x 7 = 70
10
There are 5 students sitting at a lunch table. Each student brought three sandwiches. The entire 4th grade needs 6 times as many sandwiches. How many sandwiches for the whole 4th grade are needed? equation, work, answer with a label.
90 sandwiches for the whole 4th grade
30 x 3=
90
12 x 4=
48
What are the multiples of 15? (3 of them)
15, 30, 45
There are four students at the purple table and each student brought three pencils. The green table has 4 students and each student brought 5 pencils. Ms. Reimer collected all of the pencils and split them up evenly among all the students, how many pencils does each student get? Write and EQUATION ONLY.
(4x3)+(4x5) / 8
There are four students at the purple table and each student brought three pencils. The green table has 4 students and each student brought 5 pencils. Ms. Reimer collected all of the pencils and split them up evenly among all the students, how many pencils does each student get? Solve!
(4x3)+(4x5)= 32
32/8 = 4
each student gets 4 pencils
9 x 8 =
72
25 x 5=
125
Is 63 a prime or composite number? Why?
It is a composite number because it has more factors. Some factors of 63 are 1, 63 and 7, 9
Sergio is 9 years old. His aunt is 4 times as old as Sergio. How old is his aunt? Write an equation and solve.
9 x 4 = 36
Isaac has 27 football cards. Atlas has five times as many cards. How many cards does Atlas have? Equation, work, answer with a label
27 x 5= 135
Atlas has 135 cards.
20 x 4=
80
16 x 5=
80