These lessons, with videos, examples, solutions, and songs, help Grade 2 students learn how to use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express the total as a sum of equal addends.
Related Pages
More Lessons for Grade 2
Common Core for Grade 2
Common Core: 2.OA.4
The following diagram shows that multiplication is repeated addition. Scroll down the page for examples and solutions using multiplication as repeated addition.
Arrays and repeated addition
What is an array?
An array is a group of objects arranged in rows and columns.
We can use arrays to show repeated addition.
Multiplication is repeated addition.
We can use arrays to show multiplication as repeated addition.
Multiplication Vocabulary
The whole numbers multiplied together are called factors.
The answer to a multiplication problem is called a product.
2.OA.4 Repeated Addition with Arrays
Multiplication shows the total number of items in a certain number of groups.
Arrays can be used to help solve multiplication problems.
Examples:
There were 3 spiders on the playground. Each spider made 3 webs. How many spider webs in all?
There were 4 flowers with 3 bees on each flower. How many bees in all?
Isabella went to the park. She saw 2 butterflies on each of the 5 trees. How many butterflies did she see?
Liam found 4 ladybugs on each of 4 branches. How many ladybugs did he find in all?
Arrays and Addition
Rows go side to side
Columns go up and down
Add by the rows and add by the columns.
Multiplication With Arrays
Multiplying with arrays for second grade.
How to use arrays to model repeated addition and multiplication?
Multiplication and Arrays
What are arrays and how do they show multiplication?
Commutative Property - You can multiply numbers in any order and the product will be the same.
Arrays
How to add items in an array?
Example:
Review
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