Factors & Multiples
True or False: 27 is a composite number
True!
A composite number is a number that has more than 1 factor pair.
1 x 27 = 27, 27 x 1 = 27, 9 x 3 = 27, 3 x 9 = 27
Name 2 fractions that are equivalent to 1/2
Possible Answers:
2/4, 3/6, 4/8, 5/10, 6/12, 7/14, 8/16, 9/18, 10/20, 25/50, 50/100
Add these fractions:
2/4 + 1/4 + 2/4 = ?
5/4
Write 89,500 in word form AND expanded form
(Spelling doesn't count!)
Eighty-nine thousand five hundred
80,000 + 9,000 + 500
If 1 kilometer = 1,000 meters, then how many meters are in 8 kilometers?
8 x 1,000 = 8,000
8 kilometers = 8,000 meters
True or False: 12 is a multiple of 24
False
A multiple is the result of multiplying a number. For example, 10 is a multiple of 5 because 5 x 2 = 10.
We cannot multiply 24 by anything to get 12.
3 of these fractions are equivalent to 1/4. Which ones are they?
2/8
1/6
5/20
6/12
3/12
2/8
5/20
3/12
These 3 are equivalent to 1/4 because they are the result of multiplying the numerator and denominator of 1/4 by the same number.
Find the value of 3 x 3/8
9/8
What is 40/100 in decimal form?
0.40 or 0.4
Mrs. Jones has 50 pencils. That is 5 times the amount of pencils that Ms. Pimentel has.
How many pencils does Ms. Pimentel have? Write an equation and solve.
Remember your unit!
? x 5 = 50 or 50 ÷ ? = 5?
10 x 5 = 50 and 50 ÷ 10 = 5
Ms. Pimentel has 10 pencils.
True or False: 7 is a factor of 28
True
A factor is a number that can be multiplied to make a larger number. 7 is a factor of 28 because we can multiply 7 x 4 = 28.
Which fraction is GREATER than 1/2, but is also LESS than 1 whole?
1/3
7/6
4/5
2/8
4/5 is greater than 1/2, but is also less than 1 whole
1/3 and 2/8 are both less than 1/2
7/6 is greater than 1 whole
14/100 + 5/10 + 26/100 = ?
90/100, or 9/10
Compare using > or <
854,395 _____ 812,999
290,875 _____ 723,800
367,438 _____ 99,000
854,395 > 812,999
290,875 < 723,800
367,438 > 99,000
True or False: 1 pound = 15 ounces
False
1 pound = 16 ounces
Is 59 a prime or composite number? Why?
59 is a prime number.
A prime number is a number that has only 1 factor pair, the number itself and 1.
The only way to multiply and get 59 is by doing 1 x 59 = 59. It has no other factors and therefore is prime.
List 3 different fractions that are equivalent to 4/5
Possible Answers:
8/10, 12/15, 16/20, 20/25, 40/50, 80/100
Find the value of 8 - 8/10
72/10 or 7 and 2/10
Add using the standard algorithm. You may need to regroup!
648,194 + 273,021
921,214
Ms. Bissonnette has 16 science books. Ms. Andrade has 8 times as many science books as Ms. Bissonnette.
How many science books does Ms. Andrade have? Write a multiplication equation and solve it.
Remember your unit!!
16 x 8 = 128
Ms. Andrade has 128 science books.
Find all factor pairs for the number 30
(1 x 30), (2 x 15), (3 x 10), (5 x 6)
Commutative Property applies, so if an answer is given in a different order (10 x 3 instead of 3 x 10) it still counts :)
List these fractions from LEAST to GREATEST:
5/6, 1/4, 1/2, 6/3, 2/3
From LEAST to GREATEST:
1/4, 1/2, 2/3, 5/6, and 6/3
All fractions have a Common Denominator of 24. When converted into fractions with a denominator of 24, they are:
6/24, 12/24, 16/24, 20/24, and 48/24
Subtract these mixed numbers:
2 and 3/12 - 1 and 5/12
10/12
Subtract using the standard algorithm. You may need to regroup!
491,320 - 178,413
312,907
The length of the table in inches is 72. What is the length of the table in feet?
1 foot = 12 inches
72 ÷ 12 = 6 (or 12 x 6 = 72)
The table is 6 feet long.