Counting by Tens and Ones





Unit Overview

In this unit, you will learn about the ones and tens place in 2-digit numbers. You will first learn that 10 can be shown as a bundle of 10 ones.

Then, you will learn that a 2-digit number represents tens and ones. For example, 24 is two groups of tens and 4 ones.


In this unit, you will complete a variety of activities such as counting tens and ones with fruit and cubes, watch a video of the Number Crew and play a variety of games to practice what you have learned.







Introduction to Tens and Ones

The numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 are all one-digit numbers and are represented by one.

However, once you reach 10, they become 2-digit numbers, meaning that there are two of them. The first number represents how many groups of tens there are and the second numbers represents how many ones.

For example, the number 16 has one group of tens and six ones.




Now let’s see if you can try a few!

Guess the number represented by the cubes and check your answer.


8

"Click here" to check the answer.



11

"Click here" to check the answer.




 

"Click here" to check the answer.



Activity 1: Tens and Ones

Now let’s play a game to practice and see how you do. Click on the link below and answer the questions about tens and ones.

Tens and Ones Practice




Activity 2: Tens and Ones Fruit

Let’s see if you can see how many tens and ones there are using a variety of yummy fruit!



Tens and Ones Worksheet




Activity 3: More Work with Two Digit Numbers


Now watch an exciting video from the Number Crew to learn more about 2-digit numbers. The Number Crew decides to give out some treats. The number of treats each animal gets depends on its size. Flo and Fiz hand out tickets with numbers on them to each animal, and Bradley gives out the right number of sweets. Sadly, Tiger’s ‘six’ gets ripped so it looks like a zero and Bradley can’t give him any sweets. The Monkey comforts him and they discover that when they put their digits together they have a 2-digit number ‘20’ and can claim more treats.

 

After watching the video, practice what you have learned by completing the following activity. You will look at the number at the beginning of each row and fill in how many tens there are and how many ones there are within it.



Place Value Worksheet.



BrainPop Adding and Subtracting 10s

Review: Playing Tens and Ones with Cards

For a review, grab a stack of cards. Flip over one at a time creating a 2-digit number. You will then say how many tens there are in the number and how many ones there are in it. Record these numbers in your Math Notebook including the number, the number of tens and the number of ones.








Now answer questions 1-25.