Number & Operations for Teachers 

Copyright David & Cynthia Thomas, 2009

Exercises

1. Factor each of the following composite numbers one way and represent the factorization using an array model

a. 24

b. 26

c. 33

d. 45

2. Find all possible factorizations of the following numbers

a. 24

b. 36

c. 48

d. 51

3. Find the prime factorization for the following numbers

a. 24

b. 36

c. 48

d. 51

4. Find the greatest common factor (GCF) for the following numbers

a. 48 and 72

b. 36 and 51

c. 13 and 47

d. 60 and 96

5. Find the least common multiple (LCM)

a. 48 and 72

b. 36 and 51

c. 13 and 47

d. 60 and 96