8-3 Factors

8-3 Factors

Math Message

Joanna packs 16 bottles of juice into cartons. How could she pack the bottles so that each carton has an equal number of bottles with none left over? Show your thinking using pictures or arrays. Then write a number model for each of your representations.

Open Ended

What were some of your number models for the Math Message?

Try this

How could you pack 10 bottles of juice into cartons so that each carton has an equal number of bottles with none left over?

Factor Pairs

Remember, Factor Pairs are all the pairs of numbers we can multiply to get the same product.

Multiple Choice

What are the factor pairs for ten?

• 5 and 5, 10 and 1

• 5 and 2, 10 and 1

• 3 and 7, 4 and 6

• 10 and 2, and 10 and 1

Multiple Choice

What are all the factor pairs for 12?

• 1 and 12

• 1 and 12, 2 and 6

• 1 and 12, 2 and 6, 3 and 4

• 1 and 12, 2 and 6, 3 and 4, 5 and 7

How could you use what you know about factor pairs of 12 to find the factor pairs for 120?

Multiple Choice

What are all the factor pairs for 120?

• 120 and 1

• 120 and 1, 2 and 60, 20 and 6

• 120 and 1, 12 and 10, 2 and 60, 20 and 6, 30 and 4

• 120 and 1, 12 and 10, 2 and 60, 20 and 6, 30 and 4, 40 and 3

Multiple Choice

Which is a factor pair for 18?

• 3 and 6

• 9 and 9

• 2 and 6

• 18 and 2

Multiple Choice

Which is a factor pair for 27?

• 23 and 4

• 20 and 7

• 3 and 9

• 4 and 6

Multiple Choice

Which is a factor pair for 24?

• 6 and 4

• 24 and 1

• 12 and 2

• They are all factors of 24.

Multiple Choice

Which i s a factor pair for 60?

• 15 and 4

• 9 and 5

• 6 and 7

• 12 and 3

Multiple Choice

Which is a factor pair for 72?

• 7 and 10

• 70 and 2

• 8 and 9

• 12 and 7

Multiple Choice

Which is a factor pair for 36?

• 6 and 6

• 5 and 6

• 6 and 7

• 30 and 6