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- Primary 5 Maths
- Multiplying and Dividing Integers
Arrays and factors
- Lesson: 1a3:08
- Lesson: 1b1:32
- Lesson: 1c1:34
- Lesson: 1d0:51
- Lesson: 2a3:41
- Lesson: 2b1:59
- Lesson: 2c1:23
- Lesson: 3a3:12
- Lesson: 3b2:12
- Lesson: 4a2:45
- Lesson: 4b1:05
- Lesson: 4c0:56
- Lesson: 5a2:17
- Lesson: 5b2:00
- Lesson: 5c1:31
- Lesson: 6a5:11
- Lesson: 6b2:54
Arrays and factors
Lessons
In this lesson, we will learn:
- Factors, Products, Multiplication Statements
- Writing a product for a given array
- Drawing arrays to find factors
- Using an array to describe the distributive property of multiplication
Notes:
Factors
- Numbers we can multiply to get another number
- Numbers we can multiply to get another number
- two numbers that we multiply together to get a certain product
Ex. 3 x 4 = 12
3 and 4 are both factors of 12 and 3 and 4 are a factor pair
2 x 6 = 12
2 and 6 are also factors of 12, 2 and 6 are a factor pair
BUT be careful! 2 and 4 are not a factor pair of 12 even though they are both factors of 12 because:
2 x 4 DOES NOT EQUAL 12
Tips for finding factors
- Every number has 1 as a factor
- Every number has itself as a factor
Product
- The term product in this section is used for both an expression involving multiplication and the evaluation of that expression
Ex. The product of 2 and 5 is: 2 x 5 and 10
Arrays
- An array is a diagram which represents a product
- You can draw an array with dots or with squares

Writing a product for a given array
The product is created by writing the number of rows times the number of columns
The product for the above array would be 2 x 3 or 6
- 1.Products and Arrays
Write a product for each arraya)b)c)d) - 2.Find Factors using Arrays
Draw an array to find the factors ofa)12b)6c)7 - 3.Arrays and the Distributive Property
- Write a product for the entire diagram, the unshaded squares and the shaded squares
- Write an equation for the entire diagram (using the distributive property)
a)b) - 4.Rewriting products in expanded form
Rewrite each product in expanded form (rewrite as a sum)a)6 x 12b)3 x 128c)7 x 408 - 5.Distributive Property of Multiplication (multiplying by 1-digit)
Use the distributive property to find the product:a)4 x 36b)3 x 825c)401 x 9 - 6.Distributive Property of Multiplication (2-digit x 2-digit)
Use the distributive property to find the product:a)14 x 12b)65 x 34