Rating

Ø 5.0 / 2 ratings
The authors
Team Digital
CCSS.MATH.CONTENT.1.OA.A.2

## Adding Using a Chart – Introduction

Mr. Squeaks and Imani have found themselves captured as pets! To escape, they need to solve equations using a hundreds chart. This method is a fantastic tool to help solve addition problems, see patterns, or even just count. Get ready because today, we're going to practice using a hundreds chart together!

## What Is a Hundreds Chart?

A hundreds chart is organized with numbers one through one hundred in columns and rows. When you read a hundreds chart, you read it like a book, from left to right. This visual tool helps us see how numbers increase and helps with adding numbers.

Here are the steps to tackle addition using a hundreds chart:

Step # Action
1 Circle the bigger addend, or number, on the chart.
2 Count on the amount of the second addend.
3 The number you land on is the sum, or answer.
4 Check your answer to ensure it makes sense with the problem.

Let's practice understanding this method with a few examples.

## Solving Addition Problems Using a Hundreds Chart – Examples

Example 1:

The equation Mr. Squeaks and Imani need to solve is 15 + 6.

Steps to Solve the Problem:

Step # Action
1 Circle the bigger addend on the chart: 15.
2 Count on six more: 1, 2, 3, 4, 5, 6.
3 The number you land on is 21.

The sum is 21.

Example 2:

The next equation is 23 + 7.

Steps to Solve the Problem:

Step # Action
1 Circle the bigger addend on the chart: 23.
2 Count on seven more: 1, 2, 3, 4, 5, 6, 7.
3 The number you land on is 30.

The sum is 30.

Example 3:

The next equation is 31 + 8.

Steps to Solve the Problem:

Step # Action
1 Circle the bigger addend on the chart: 31.
2 Count on eight more: 1, 2, 3, 4, 5, 6, 7, 8.
3 The number you land on is 39.

The sum is 39.

## Solving Addition Problems Using a Hundreds Chart – 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 Problems Using a Hundreds Chart – Summary

Key Learnings from this Text:

• Solving problems using a hundreds chart can be achieved by following these steps:
Step # Action
1 Circle the bigger addend, or number, on the chart.
2 Count on the amount of the second addend.
3 The number you land on is the sum, or answer.
4 Check your answer to ensure it makes sense with the problem.
• Mastering the use of a hundreds chart is an important foundational math skill.

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

## Solving Addition Problems Using a Hundreds Chart – Frequently Asked Questions

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

Would you like to apply the knowledge you’ve learned? You can review and practice it with the tasks for the video Adding Using Chart.
• ### What are the steps for adding on a 100 chart?

Hints

Addend is a special name for the numbers that you are adding together.

You will find the sum at the very end of an addition problem.

Solution

To solve an addition problem using a 100 chart, follow the steps below:

1. Find the bigger addend. For example, in the problem 12 + 4 = ?, 12 is the larger addend.
2. Circle the bigger addend on the 100 chart. For example, in the problem, 12 + 4 = ?, you would circle 12 on the number chart.
3. Find the smaller addend. For example, in the problem 12 + 4 = ?, 4 is the smaller addend.
4. Count on the amount of the smaller addend. For example, in the problem, 12 + 4 = ?, begin at the number 12 that you have circled and then count on 4 more.
5. The number that you land on is the sum, or answer. For example, in the problem, 12 + 4 = ?, you land on the number 16. So, 12 + 4 = 16.
• ### Solve an addition sentence using a 100 chart.

Hints

The larger addend is 35. So, you should begin at the number 35 on the 100 chart.

The smaller addend is 8. You need to count on 8 more from 35 to find the sum on the 100 chart.

Remember, you should read a 100 chart like a book: from left to right!

Solution

Here are the steps for solving the equation, 35 + 8 = ?, with a 100 chart:

• Begin at the larger addend, which is 35. Circle 35 on the 100 chart.
• Count on the amount of the smaller addend. In this equation, the smaller addend is 8, so you should count on 8 spaces on the 100 chart.
• The number that you land on, 43, is the sum. So, 35 + 8 = 43.

• ### Determine the sum of an addition sentence.

Hints

To solve an equation, first find and begin at the larger addend on the 100 chart.

Count on the amount of the smaller addend to find the sum.

Remember, you read a 100 chart like a book: from left to right!

Solution

To solve an addition problem using a 100 chart, follow the steps below:

2. Circle the bigger addend on the 100 chart.
4. Count on the amount of the smaller addend.
5. The number that you land on is the sum, or answer.

When you solve, the equations and sums should match as follows:

• 44 + 6 = 50
• 10 + 7 = 17
• 42 + 11 = 53
• 75 + 6 = 81

• ### Identify the sum of an addition sentence using a 100 chart.

Hints

Look at the equation carefully to find the larger addend. It is not always the first number that you see.

Remember, begin at the larger addend on the 100 chart and count up the smaller addend amount. The number you land on is the sum.

Solution

To solve an addition problem using a 100 chart, follow the steps below:

1. Determine the bigger addend. This is not always the first number! For example, in the equation 3 + 70 = ?, 3 comes first, but 70 is greater than 3!
2. Circle the bigger addend on the 100 chart.
4. Count on the amount of the smaller addend.
5. The number that you land on is the sum, or answer.

When you solve, the equations and sums should match as follows:

• 3 + 70 = 73
• 28 + 7 = 35
• 61 + 7 = 68
• 40 + 12 = 52

• ### Show how to add on a 100 chart.

Hints

The addends are 50 and 6. The bigger number is already highlighted on the 100 chart.

The smaller addend is 6. Count up from 50 to find the sum.

Remember, you read a 100 chart like a book: from left to right!

Solution

To solve the equation, 50 + 6 = ?, first find the larger addend, which is 50. 50 is already highlighted. Next, find the smaller addend, which is 6. Count up until you reach the sum, 56. Highlight each number as you count.

• ### Calculate the sum of each addition sentence.

Hints

Look carefully, the larger addend is not always the first number in the equation.

Remember, to solve with the 100 chart, begin at the larger addend and count up the amount of the smaller addend.

Solution

Sum of 72

• 12 + 60 = 72
• 50 + 22 = 72
Sum of 90
• 69 + 21 = 90
• 2 + 88 = 90
Sum of 45
• 36 + 9 = 45
• 20 + 25 = 45