The Hundreds Chart
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Basics on the topic The Hundreds Chart
Hundreds Charts – Definition
What is a hundreds number chart, and how do you use it? In this text we explore how to use a hundreds chart in math.
A hundreds chart is a tool to see patterns, count, and even add or subtract. A one hundreds chart has the numbers one to one hundred organized into columns and rows.
Looking at the squares, you see they count forward by one (...) in rows of ten. When we read a hundreds chart we read it the same way that we read a book, from left to right. Like reading, when we get to the last number on the right we go down to the next row and start from the left again.
You might notice patterns in hundreds charts if you look at the columns. You can see that all of the numbers in the ones place of this column have the number two… and that the other columns and rows follow similar patterns.
Hundred Charts – Missing Numbers
What happens when you find a hundreds chart with missing numbers? When there is a missing number on a hundreds chart, you can use counting on a hundreds chart and patterns to help fill in the hundreds chart. You can use what you know about place value to help figure out where the missing number will go.
Hundreds Charts – Practice
Let’s practice finding the missing number using the example below!
Skylar and Henry have the number thirty-four and need to figure out where it goes on the chart! Thirty-four has a three in the tens place, so we can find the other numbers that start with three. Then we can count starting from the first number with a three in the tens place to find where thirty-four goes.
Thirty-four comes after thirty-three and before thirty-five!
The Hundreds Chart – Summary
Today we learned all about the hundreds chart, a tool with numbers to count, see patterns, and even add or subtract. We learned about columns and rows… and even how to find a missing number on the hundreds chart! Interested in more activities on hundreds charts? At the end of this video there is continued practice through interactive exercises and worksheets hundreds charts.
Transcript The Hundreds Chart
: "Let's use this handy map to help us go exploring!" : "Huh, what's that on the back of the map?" : "What are all of these numbers for, and why are some of them missing?" : "Maybe if we figure it out it will help us find treasure!" : "Treeeaaaaaasure!" Skylar and Henry want to find a treasure, but first, they need to learn more about the hundreds chart. What is a hundreds chart? A hundreds chart is a tool to see patterns, count, and even add or subtract. It has the numbers one to one hundred organized into columns and rows. Looking at the squares, you see they count forward by one (...) in rows of ten. You might be able to see a pattern in the ones place of each number. For example, let’s look at the column that starts with the number two. If you look at the ones place in every number of this column, what do you see? Every square vertically has the number two in its ones place. You might notice that other numbers follow this pattern as well... like here, where every square horozontally has the number one in it's tens place. When we read a hundreds chart we read it the same way that we read a book, from left to right. Like reading, when we get to the last number on the right we go down to the next row and start from the left again. It looks like Henry and Skylar found something! : "Henry, look, a box!" : "is it a clue? ....I think thats what's missing!" Let's help Henry and Skylar figure out where this number goes on the hundreds chart to get closer to the treasure! When there is a missing number on a hundreds chart, you can use counting and patterns to help figure out where it goes. Henry and Skylar's number is sixteen. Where should sixteen go on the chart? (...) Sixteen has a one in the tens place so it will go with the other teen numbers that follow this pattern. Let's count the teen numbers to find out where it goes! Eleven (...) twelve (...) thirteen (...) fourteen (...) fifteen (...) sixteen (...) We found it! Sixteen goes after fifteen. : " A wrench! We can use that to tighten the wheels and get to the treasure!" While Henry was tightening the wheels, Skylar noticed another number box! Let's use what we know about the hundreds chart to help them figure out where this number goes. Their next number is forty-four. Since forty-four begins with four, we can start with this row, and count up until we find it's place. Count with me! Forty (...) forty-one (...) forty-two (...) forty-three (...) forty-four! So, forty-four goes after forty-three! : "We got oil! Maybe if we put this on the wheels it will make the train faster and get to the treasure." Before we see what the treasure is, let's review. Today we learned about the hundreds chart. It's a tool with numbers to help count, see patterns, and even add or subtract. We saw how it is organized with columns and rows... and explored how to find missing numbers. Now, let's go see that treasure! : "I wonder what the treasure will be!" : "We're here, we're here! We made it to the treasure!" : "Look Skylar, a house! Our treasure is a house!" : "Wait a second Henry... , that's OUR house."
The Hundreds Chart exercise
Can you complete the hundreds chart?Hints
Look at the numbers around the missing number.
- What do the numbers in that row begin with?
- What do the numbers in that column end with?
Look at the number before the missing number, what comes next?
For example, here we can see that 14 comes before the missing number. One more than 14 is 15.Solution
Here is the complete hundred square.
Match the parts of the hundreds square.Hints
Look at the numbers around the missing number.
- What do the numbers in that row begin with? What number is in the tens place?
- What do the numbers in that column end with? What number is in the ones place?
For example, here we can see that the numbers in the row have a 3 in the tens place and the numbers in the column have a 7 in the ones place, so the missing number is 37.
Look at the number before the missing number, what comes next?Solution
Here are the correct missing numbers.
Can you fill in the missing numbers?Hints
Look at the other numbers in the row, what will the missing number have in the tens place?
Look at the other numbers in the column, what will the missing number have in the ones place?
Remember, you read a hundred square like a book so when you get to the end of a row, the next number comes at the beginning of the next row.Solution
Here is the completed hundreds chart with the numbers that were missing highlighted.
Can you order the numbers?Hints
Find the smallest number in each set to start with and then find this number on the hundreds chart. What comes next?
Do the numbers that you are ordering start with the same number? Find the row with those numbers on to help you order.
Remember, you read a hundreds chart like a book, so once you get to the end of one row you go to the left of the next row to continue reading.
You need to use one of the columns to help you order the final sequence.Solution
- 5, 6, 7, 8, 9, 10 (colored green)
- 18, 19, 20, 21, 22 (colored pink)
- 34, 35, 36, 37, 38 (colored yellow)
- 79, 80, 81, 82, 83 (colored blue)
- 95, 96, 97, 98, 99, 100 (colored orange)
- 30, 40, 50, 60, 70 (colored purple)
Which number is missing?Hints
Take a closer look at the section of the hundred square with the missing number.
Look at the row with the missing number, which number is in the tens place?
Look at the column with the missing number, which number is in the ones place?
Which number comes before the missing number? What is one more than that?Solution
56 was the missing number.
Which numbers are incorrect?Hints
Look across each row. Are there any numbers that have a different number in the tens place?
Look down each column. Are there any numbers that have a different number in the ones place?
There are 10 mistakes.Solution
Here we can see the mistakes Henry made.
Looking at these highlighted numbers:
- 21 should have been 12
- 90 should have been 19
- 42 should have been 24
- 14 should have been 40
- 59 should have been 58
- 58 should have been 59
- 66 should have been 65
- 7 should have been 77
- 19 should have been 90
- 10 should have been 100