Show:
Factors
Multiples
Estimating 100-300
Prime/Composite 400&500
Halve and Double
100,1000,10000
100
What are the factors of the number 20?
1, 2, 4, 5, 10, 20
100
Find the first 3 multiples of the number 20.
20, 40, 60...
100

23 X 58 = 

20 X 60 = 1,200

100

50 X 44

100 X 22 = 2,200

100

34 X 10

340

200
True or False: 4 is a factor of 48.
True
200
What is a MULTIPLE?
Multiples are the numbers we find when we SKIP COUNT.
200

34 X 285 = 

30 X 300 = 9,000

200

200 X 44 

100 X 88 = 8,800

200

42 X 10,000

420,000

300
What are the factors of the number 24?
1, 2, 4, 6, 8, 12, 24
300
True or False: 4 is a multiple of 20.
FALSE. 4 is a FACTOR of 20.
300

250 X 23

250 X 20 = 5,000
300

26 X 50

13 X 100 = 1,300

300

240 X 20 = 

4800

400
What are FACTORS?
Factors are the numbers multiplied together to find a product. Also acceptable: A factor is a number that fits evenly into another number.
400
Find the first 3 MULTIPLES of the number 16.
16, 32, 48...
400

What is a prime number and what is a composite 

Prime has only 2 factors which are 1 and the number itself 


Composite numbers have more than two factos 

400

42 X 200 

84 X 100 = 8,400

400
250 X 3000

750,000

500
What are the factors of the number 36?
1, 2, 3, 4, 6, 9, 12, 18, 36
500
What are the first 3 MULTIPLES of the number 36?
36, 72, 108...
500
The ONLY even prime number is ______
2
500

5,000 X 38

10,000 X 19 = 190,000 

500

3,300 X 300

990,000