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

Fill in the Blanks

What is the missing factor in the T chart?

Fill in the Blanks

What is the missing factor in the T chart?

T charts help you list your factors!

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

Fill in the Blanks

Write the factors from least to greatest using this T chart.

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