Multiplication Lesson Topic Index | Grade 3 Math | Elementary Test Prep | StudyZone

You can use arrays to see the relationship between addition and multiplication.

An array is objects arranged in rows and columns.
Rows go from left to right.
Columns go from top to bottom.

An array can be a picture to show how to add equal groups. Look at the rows and columns.

Write 2 + 2 + 2 = 6
or 3 groups of 2
3 x 2 = 6

Write 3 + 3 = 6
or 2 groups of 3
2 x 3 = 6

In addition  you can reverse the order of the addends and still get the same answer. (ex: 2 + 6 = 8 or 6 + 2 = 8)

In multiplication you can reverse the order of the factors and still get the same answer.
(ex: 3 x 6 = 18 or 6 x 3 = 18)

Look at each array. You can write an addition sentence and a multiplication sentence for each.

3 + 3 + 3 + 3 = 12

4 groups of 3
or
4 x 3 = 12

4 + 4 + 4 = 12

3 groups of 4
or
3 x 4 = 12

2 + 2 + 2 + 2 + 2 = 10

5 groups of 2
or
5 x 2 = 10

5 + 5 =10

2 groups of 5
or
2 x 5 = 10

Multiplication is a short cut for addition. Write a multiplication sentence that is a short cut for each addition sentence.

 Addition Multiplication 7 + 7 + 7 = 21 3 x 7 = 21 4 + 4 + 4 + 4 = 16 4 x 4 = 16 9 + 9 = 18 2 x 9 = 18 6 + 6 + 6 + 6 + 6 = 30 5 x 6 = 30

Click on the apple for practice.

 Topic Index | Grade 3 Math | Elementary Test Prep | StudyZone Created by Cindy Murabito Updated by Pat Delia Copyright © 2001-06 Oswego City School District