# Make a Number Line to Add

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Make a Number Line to Add
CCSS.MATH.CONTENT.2.OA.A.1:

## Making a Number Line to Add – Introduction

We're diving into the world of adding with a number line. This method helps us visualize addition and ensure we have the correct amount of materials for our project. Get your paper and pencils ready because today, we're going to practice this together!

## What Is Addition with a Number Line?

Addition with a number line involves drawing a number line, placing the larger number on the left, and then moving forward in steps equal to the smaller number. This visual method makes it easier to see how numbers combine.

Here are the steps to tackle addition using a number line:

Step # Action
1 Create an equation and draw a number line.
2 Put the larger addend on the left side under the first dash.
3 Skip count forward by the smaller addend.
4 Find the sum by looking at the number you land on.
5 Check your answer to ensure it makes sense with the problem.

Let's practice understanding addition with a number line with a few examples.

## Solving Addition with a Number Line – Example

Example 1:

Mr. Squeaks has 21 wood planks and 45 nails. How many does he have altogether?

Steps to Solve the Problem:

Step # Action
1 Draw a number line and create the equation $21 + 45$.
2 Put the larger addend (45) on the left side.
3 Skip count forward by 21.
4 Break 21 into two tens and one.
5 Skip count: 45 + 10 = 55, 55 + 10 = 65, 65 + 1 = 66
6 The sum is 66.

Mr. Squeaks has 66 wood planks and nails altogether, which is enough!

Example 2:

Mr. Squeaks has 37 orange roof tiles and 43 blue roof tiles. How many does he have in total?

Steps to Solve the Problem:

Step # Action
1 Draw a number line and create the equation $37 + 43$.
2 Put the larger addend (43) on the left side.
3 Skip count forward by 37.
4 Break 37 into three tens and seven.
5 Skip count: 43 + 10 = 53, 53 + 10 = 63, 63 + 10 = 73, 73 + 7 = 80
6 The sum is 80.

Mr. Squeaks has 80 roof tiles in total.

Example 3:

Mr. Squeaks has 67 blue flowers and 25 orange flowers. How many does he have in all?

Steps to Solve the Problem:

Step # Action
1 Draw a number line and create the equation $67 + 25$.
2 Put the larger addend (67) on the left side.
3 Skip count forward by 25.
4 Break 25 into two tens and five.
5 Skip count: 67 + 10 = 77, 77 + 10 = 87, 87 + 5 = 92
6 The sum is 92.

Mr. Squeaks has 92 flowers in total.

## Solving Addition with a Number Line – Practice

Now, let's put your skills to the test. Solve these problems on your own, and check the solutions when you're ready!

## Solving Addition with a Number Line – Summary

Key Learnings from this Text:

• Solving problems using a number line can be achieved by following these steps:
Step # Action
1 Create an equation and draw a number line.
2 Put the larger addend on the left side under the first dash.
3 Skip count forward by the smaller addend.
4 Find the sum by looking at the number you land on.
5 Check your answer to ensure it makes sense with the problem.
• Mastering addition using a number line is an important visual math skill.

Keep practicing these steps, and you'll become a pro at adding numbers using a number line! Check out more fun math challenges and exercises on our website to continue sharpening your skills.

## Solving Addition with a Number Line – Frequently Asked Questions

Why do we use a number line for addition?
Can I use a number line for subtraction?
What if I land on a number that seems wrong?
Can I add more than two numbers on a number line?
How can I get better at using a number line?

## Make a Number Line to Add exercise

Would you like to apply the knowledge you’ve learned? You can review and practice it with the tasks for the video Make a Number Line to Add.
• ### What are the steps to make a number line to add?

Hints

What do we need to do before we put the larger addend on the left?

What do we need to do with the smaller addend in order to get our sum?

Solution

First, we draw a number line.

Second, we put the larger addend on the left. In this problem, 43.

Third, we skip count the smaller addend. In this problem +10 three times and then +7 (making 37).

Finally, we find our sum, which in this problem, is 80.

• ### Use the number line to find the sum.

Hints

Here you can see that 56 + 10 is 66.

Keep counting up to find your sum!

Finding your sum is the last step, so look for the last number on the number line to find your solution.

Solution

The answer is 88! We put 56, our larger addend, first and count up by 10s and then 2 in order to fill in our number line.

• ### Can you use a number line to find the sum?

Hints

Remember to start by counting by intervals of 10 to reach your final answer!

Be sure to identify which is the larger addend and start by putting that on the left.

Solution

22 + 34 = 56

• We put 34 to the left of our number line because it is the larger addend.
• Then we count up by 10 two times: 44, 54.
• We have 2 more seeds remaining, so we add those 2 to get our final answer, 56.
Mr. Squeaks has 56 seeds in total.
• ### Can you use a number line to find the sum?

Hints

Make sure that you put the largest addend on the left.

Remember that you need to skip count to find your solution. Use the number line above to help.

Solution
• First we find our largest addend 57 and put it on the left of our number line.
• Then we skip count by 10 three times and reach 87.
• We still need to add 5 more, which gives us our answer: 92 nails.
Imani has 92 nails.
• ### Solve the word problem.

Hints

If Mr. Squeaks has fewer cookies than Imani, that means that Imani has more cookies than Mr. Squeaks, so we need to add these numbers.

Remember to add all of the cookies. 10 have already been added, how many more need to be added to find the sum?

Solution

First, we identify our larger addend, 45 cookies. Then we skip count by 10 to add the 13 more cookies Imani has. This leads us to 55 cookies. We need to add 3 more. Imani has 58 cookies in total.

• ### Solve the word problem.

Hints

You can separate this problem into two separate number lines on your own if it makes it easier to solve.

Start with 25 and + 10 three times. You count by 10 three times because you're adding 2 tens from 20 and 1 ten from 12.

Solution
• First, we identify our largest addend, 25 bracelets.
• Then we skip count by 10 to add the 20 more bracelets Imani made. This leads us to 45 bracelets.
• We then skip count again by 10 to reach 55 bracelets.
• We need to add 2 more.
Imani made 57 bracelets total.