Factor Lesson 4th/5th

Factors

Factors with arrays and T models

What are Factors?

• Factors are all the numbers that multiply into a given number.

• For example : all the Factors for 12 are:

• 1, 2, 3, 4, 6, 12

• 
  

  How did we get those numbers?

• We found all the numbers that can multiply together to equal 12 and put them in least to greatest order.

• 1x12, 2x6, 3x4 --> 1, 2, 3, 4, 6, 12

Multiple Choice

What are all the factors for the number 18?

• 1, 2, 3, 4, 5, 6, 8, 10

• 1, 2, 3, 6, 9, 18

• 1, 2, 9, 18

• 2, 3, 6, 9, 18

Factors using arrays

I can use arrays to help me find the factors for numbers.

Multiple Select

Choose all the possible arrays for the number 20.

There is more than one correct answer.

T charts or models

T charts are another way to find factors. They organize the numbers to help you not repeat numbers

T charts help you list your factors!

They help you list your factors in order from least to greatest.

Draw

Draw a t-chart and write all the factors for the number 10.

T- chart for the number 10.

​10

​1 10

2 5

Multiple Choice

How many factor PAIRS does the number 9 have?

• 1

• 2

• 3

• 4

The number 9 has 2 factor PAIRS

1x9 and 3x3

Poll

Which method do you like more to help you find factors?

• Arrays

• T chart