Factors
Is 15 prime or composite? How do you know?
Composite. 15 has more than one factor pair.
1 x 15
3 x 5
What makes a number prime?
It has only two factors (1 and itself)
What is 8,896 + 2,456?
11,352
What are the factors of 24?
1, 2, 3, 4, 6, 8, 12, 24
What is the only even prime number?
What is 2?
What makes a number composite?
It has more than two factors.
Draw three rectangle models that represent factor pairs of the number 24.
Possible answers:
1 x 24
2 x 12
3 x 8
4 x 6
What are the factors of 40?
Factors of 40: 1, 2, 4, 5 ,8, 10, 20, 40
What are the prime numbers between 1 and 20?
2, 3, 5, 7, 11, 13, 17, and 19.
1 and 30 is a ____ ____ of 30?
Factor Pair
Solve the subtraction equation:
7,489 - 4,631
2,858
What are the factors of 50?
1, 2, 5, 10, 25, 50
First 5 multiples of 40
40, 80, 120, 160, 200
What is the last prime number before you get to 100?
97
4 is a ______ of 16.
Factor
Round 5,312 to the nearest 10.
*Think about what you know about rounding! This is a preview of what's coming...
5,310
List first 5 multiples of 500.
500, 1,000, 1500, 2000, 2500
Is 562 prime or composite?
Composite.
30 is a ______ of 5.
Mutiple
Solve the multiplication equation:
15 x 8
120