Need Help?

Get in touch with us

bannerAd

Uses of Arrays

Sep 23, 2022
link

Key Concepts

  • Identify if a group is an array

Introduction

To find the totals by using an array, first, we have to know about the repeated addition. Let’s know what repeated addition is and how we can add numbers repeatedly. 

Repeated addition

We can model repeated addition with an array. Let’s add the same number again and again and find the answer. 

Adding the same number (addend) over and over. 

3 + 3 + 3 + 3 = 12 

star

Here we are adding 3 stars repeatedly four times. 

parallel

Example: 

Model repeated addition with an array. 

smiley

Here we can add 4 smileys repeatedly.  

4 + 4 + 4 + 4 = 16 

Arrays: 

parallel

Arrays have equal rows and equal columns. 

dot

Here the image contains 5 equal rows and 3 equal columns. 

Arrays have equal rows. 

dot horizontal

There are 5 equal rows. Each row has 3 dots. 

Arrays have equal columns

dot vertical

There are 3 equal columns. Each column has 5 dots. 

We can define an array as a set that shows equal groups in rows and columns. 

array

Here we can see that there are three rows and four columns. 

Example 1: 

Count the number of rows and columns present in the given image. 

Example 1: 

Count the number of rows. 

Then we have to count the number of columns. 

From the figure, we can say that there are 4 rows and 4 columns in the image. 

Example 2: 

Write the number of rows and columns the given image has. 

Example 2: 

Solution: 

There are 3 columns and two rows. Each column has two stars, and each row has 3 stars. 

Example 3: 

Write two equations which explain the array. 

Example 3: 

Solution: 

There are 4 objects in each row if we count row-wise. 

There are 2 objects in each column if we count column -wise. 

By rows the required equation is 4 + 4 = 8 

By columns the required equation is 2 + 2 + 2 + 2 = 8. 

Example: 

Which addition statement describe the array? 

Example:
Example:

Solution: 

There are 2 rows and 5 columns. 

So, the equation for the array is, 

5 + 5 

2 + 2 + 2 + 2 + 2 

So, the required answer is 5 + 5.

Exercise

  • Write two equations that explain the array.
Write two equations that explain the array.
  • Write the equation by rows for the array.
Write two equations that explain the array.
  • Write two equations that explain the array.
Write two equations that explain the array.
  • Write the equation by rows for the array.
Write two equations that explain the array.
  • Write the equation by columns for the array.
Write two equations that explain the array.
  • Write the equation by rows for the array.
Write two equations that explain the array.
  • Write two equations that explain the array.
Write two equations that explain the array.
  • Write the equation by columns for the array.
Write two equations that explain the array.
  • Write two equations that explain the array.
Write two equations that explain the array.
  • Write the equation by columns for the array.
Write two equations that explain the array.

Concept Map

Concept Map

What we have learned

  • How to identify a group of an array?

Comments:

Related topics

Composite Figures – Area and Volume

A composite figure is made up of simple geometric shapes. It is a 2-dimensional figure of basic two-dimensional shapes such as squares, triangles, rectangles, circles, etc. There are various shapes whose areas are different from one another. Everything has an area they occupy, from the laptop to your book. To understand the dynamics of composite […]

Read More >>
special right triangles_01

Special Right Triangles: Types, Formulas, with Solved Examples.

Learn all about special right triangles- their types, formulas, and examples explained in detail for a better understanding. What are the shortcut ratios for the side lengths of special right triangles 30 60 90 and 45 45 90? How are these ratios related to the Pythagorean theorem?  Right Angle Triangles A triangle with a ninety-degree […]

Read More >>
simplify algebraic expressions

Ways to Simplify Algebraic Expressions

Simplify algebraic expressions in Mathematics is a collection of various numeric expressions that multiple philosophers and historians have brought down. Talking of algebra, this branch of mathematics deals with the oldest concepts of mathematical sciences, geometry, and number theory. It is one of the earliest branches in the history of mathematics. The study of mathematical […]

Read More >>
solve right triangles

How to Solve Right Triangles?

In this article, we’ll learn about how to Solve Right Triangles. But first, learn about the Triangles.  Triangles are made up of three line segments. These three segments meet to form three angles. The lengths of the sides and sizes of the angles are related to one another. If you know the size (length) of […]

Read More >>

Other topics