Prime Numbers
Define a Prime Number and give 3 examples that are less than 10.
A number with exactly 2 factors: 1 and itself.
2, 3, 5, 7
What is a "factor pair" of a number?
Two numbers that multiply to the number.
Compare the fractions using <, >, or =
4/8 2/4
4/8 = 2/4
What does x equal?
2/3 = x/9
x=6
Simplify the fractions 5/10.
1/2
Add the fractions: 2/5 + 2/5
4/5
Subtract the fractions: 3/10 - 3/10
0
1/3 * 2/5
2/15
What is a number that has more than 2 factors called?
Composite
What is a "factor" of a number?
A factor is a number that when divided by a number, gives a whole number as the result.
Compare the fractions using <, >, or =.
1/5 and 1/3
1/5 < 1/3
What does x equal?
1/3 = x/15
x=5
Simplify the fraction 8/12.
2/3
Add the fractions: 1/4 + 1/4
1/2
Subtract the fractions: 4/7 - 3/7
1/7
4/12 * 11/4
11/12
Are the following numbers prime, composite, or neither?
0, 1, 2, 4
0: Neither
1: Neither
2: Prime
4: Composite
What are the factors of 25?
1, 5, 25
Compare the fractions using <, >, or =.
2/3 and 10/16
2/3 > 10/16
What does x equal?
5/10 = x/2
x=1
Simplify the fraction 6/18.
1/3
Add the fractions: 7/10+1/5
9/10
Subtract the fractions: 1/5 - 1/10
1/10
2/3 of 6
4
Find the Prime Factorization for the number 24.
2 × 2 × 2 × 3
or
23 x 3
What is the greatest common factor of 24 and 32?
8
Compare the fractions using <, >, or =.
3/5 13/20
3/5 < 13/20
What does x equal?
3/4 = x/24
x=18
Simplify the fraction 4/40.
1/10
Add the fractions: 2/6 + 4/12
2/3
Subtract the fractions: 11/14 - 1/2
2/7
42 x 5/6
35
Find the prime factorization for 128.
2 × 2 × 2 × 2 × 2 × 2 × 2
or
27
What is the greatest common factor of 24, 42, and 60?
6
Compare the fractions using <, >, or =.
25/4 and 63/10
25/4 < 63/10
Write two equivalent fractions for 1.
1/1, 2/2, 3/3, 4/4
(other possible answers)
Simplify the fraction 14/49.
2/7
Add the fractions: 1/4 + 5/6
13/12
Subtract the fractions: 23/100 - 2/25
3/20
3/10