Area Model
34 x 2
68
53 x 2
106
What are the factors of 2
2 x 1
2
What is 22
4
78 x 5
390
54 x 5
270
What are the first 5 multiples of 5
0, 5, 10, 15, 20
Which number is composite? 100 or 7?
100, duh!
What is the square root of 25
5
48 x 7
336
78 x 4
312
What are the factors of 18
Which 3 numbers are prime? 5, 6, 7, 8, 9, 10, 11
5, 7, 11
There are 5 buckets. Each bucket has 3 fish inside. How many fish are there in all?
15 fish
496
215 x 3
645
What are the first 5 multiples of 12
Which is a prime number 17 or 18? Explain why
17 is a prime number because its only factors are 17 and 1.
What is 72
49
1,582 x 3
4,746
1,234 x 5
6,170
What are the factors of 28?
1 x 28, 2 x 14, 4 x 7
Are all even numbers composite?
No! 2 is the only even number that is prime.
What is the square root of 121
11