## Counting Rectangular Arrays Objects in Rows and Columns

#### Aligned To Common Core Standard:

**Grade 2 Operations** - 2.OA.4

Two easy ways to count objects in rows and columns - Counting objects is all fun and games until you get too many things to count. Like, imagine you in your teacher's shoes, who have to count you and all your classmates every day. So, now, we will discuss easier ways to count objects present in rows and columns. 1. By multiplication, we can count objects quickly and correctly. Let's suppose you have 3 rows, where you and your class-fellows sit in the classroom. Each row has 10 students sitting right behind each other. So, you can just multiply 3 with 10, and you will find the total number of students in your class without counting all of them one by one. 2. Take an array of numbers, and let us consider the previous example again in a different way. You are sitting in a pair of three in each row. There are three pairs in total, and you have 10 pairs in the whole classroom. So, now we multiply 3 by 10, and you will get 30. 30 are the total students in your classroom. With these math worksheets we have students actively learn to use rows and columns in math.

### Printable Worksheets And Lessons

- Step-by-Step Lesson-
Change a simple 2 x 4 array into an addition sentence. It can also
be used to move to multiplication too.

- Guided Lesson
-The first two problems are very clear and concise array problems.
The third problem is a bit of a mystery.

- Guided Lesson Explanation
- Everything is broken down for you visually with this one.

- Practice Worksheet
- Write the addition sentences that all these array can be made
into.

- Match Arrays to Number Sentences Worksheet - Visually odd arrays are composed here. Match them to their number counterparts.

#### Homework Sheets

We use visuals, outlines, and number in the different arrays to work through.

- Homework 1- In a shop, there are some cookies arranged in two rows with seven columns. Each cookies is used by only one student. What is the total number of students in the class?
- Homework 2- Write an addition sentences based on the blocks.
- Homework 3- Write the addition sentence that is shown below.

#### Practice Worksheets

Every problem will offer you a new unique perspective.

- Practice 1- Sherry bought some new skirts. She arranges the skirts in her closet. She arranged them in four rows with four columns. How many skirts did she bring home?
- Practice 2- Write an addition sentence to match the block pattern below.
- Practice 3- James bought some new toys. He has to arrange the toys in his closet. He arranged them in three rows with three columns. How many toys did he bring home?

#### Math Skill Quizzes

Quizzes were a little tough to put together because each problem takes up a lot of space.

- Quiz 1- Ana bought new gowns. She has to arrange them in her closet. She arranged them in four rows with four columns.
- Quiz 2- Peter brought new masks to his home. He has to arrange the masks in his closet. He arranged them in five rows with five columns. How many masks did he bring home?
- Quiz 3- Write an addition sentences for the blocks.