1. 1
Do Now
AIM: Least Common Multiple
Convert the following to scientific notation.
a.) 58,000,000 b.) 0.0000000002
Convert the following to standard notation.
a.) 5.2 X 10-5
b.) 8.0 X 106

2. 2
Anticipatory Set
1.) Define Least.
2.) Define Common.
3.) Define Multiple.
Least Common Multiple

3. 3
1.) Based on the methods you have used in previous math
classes, find the least common multiple of the following
numbers.
10
8
2.) Explain the method you used to find the least common
multiple.
Anticipatory Set:
10, 20, 30, 40, 50, 60, 70, 80, .......
8, 16, 24, 32, 40, 48, 56, 64, 72, 80, .....

4. 4
3.) Find the prime factorizations of the following numbers.
Write the answers in exponential form.
10 8

5. 5
3.) Find the prime factorizations of the following numbers.
Write the answers in exponential form.
10 8
2 2
2 2
45

6. 6
3.) Find the prime factorizations of the following numbers.
Write the answers in exponential form.
10 8
2 2
2 2
45

7. 7
3.) Find the prime factorizations of the following numbers.
Write the answers in exponential form.
10 8
2 2
2 2
45
10 = 2 5
8 = 23

8. 8
3.) Find the prime factorizations of the following numbers.
Write the answers in exponential form.
10 8
2 2
2 2
45
10 = 2 5
8 = 23
Finding Least Common Multiple: The product of the
largest power of every distinct factor.

9. 9
Think-Pair-Share Activity:
Find the least common multiple of the following
numbers using the prime factorizations of the
numbers.
1.) 60 130

10. 10
2.) 2 7

11. 11
3.) 14 35 49

12. 12
Extra Practice

13. 13
4.) Your group is planning a picnic. You can purchase
paper plates in packages of 30, paper napkins in
packages of 50, and paper cups in packages of 20.
a.) How many of each item would you need to have an
equal amount of each?

14. 14
4.) Your group is planning a picnic. You can purchase
paper plates in packages of 30, paper napkins in
packages of 50, and paper cups in packages of 20.
b.) What is the least number of each type of package
that you can buy and have that equal amount of each?

15. 15
BEFORE YOU LEAVE:
1.) Explain the similarities and differences in the methods for
find the Greatest Common Factor and the Least Common Multiple.
Similarities Differences

16. 16
Homework: Castle Homework #7 due Friday
Mr. Tjersland's Math 7

17. 17
AIM: Least Common Multiple
Finding Least Common Multiple: The product of the
largest power of every distinct factor.
Find the least common multiple of the following numbers
using the prime factorizations of the numbers.
1.) 60 130
3.) 14 35 49