Partitioning into tens and ones

Learning focus

Learn how to partition numbers into tens and ones using a place value chart and a part-whole model.

This lesson includes:

  • one video
  • one activity


First, watch this video below from BBC Bitesize for a reminder about tens and ones.

Partitioning into tens and one

Here are some numbers under 100. Can you partition them into tens and ones?

43, 61, 89, 35

Let’s see how many tens and ones are in each number. We can use a place value chart to help us.


43 has 4 tens and 3 ones.


61 has 6 tens and 1 one.


89 has 8 tens and 9 ones.


35 has 3 tens and 5 ones.

Part-whole diagrams

You can also use a part-whole diagram to show the tens and ones in each number.

Let's look at the same numbers again, but this time let's represent them using a part whole diagram.

Now let's try some more examples.

Which number has 5 tens and 4 ones?

5 tens and 4 ones = 54

Which number has 3 tens and 8 ones?

3 tens and 8 ones = 38

Which number has 7 tens and 0 ones?

7 tens and 0 ones = 70


Activity 1

Practise partitioning numbers into tens and ones.

In 17 sweets, there are 1 ten and 7 ones.

In 23 apples, there are 2 tens and 3 ones.

Remember that numbers up to 100 can be partitioned into tens and ones.

The first digit is the tens and the last digit is the ones.


Play Guardians: Defenders of Mathematica to learn more about this topic and test your skills.

Guardians: Defenders of Mathematica

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