X Tables
Topmarks Maths

Topmarks Hit the Button halves maths mission

A practical mini-mission using halves to practise division by 2 through questions, examples and child-friendly challenges.

Quick answer

Halves are the same as dividing by 2. When you split something into 2 equal parts, each part is a half. You can find half of a number by dividing it by 2.

Learning outcome

By the end of this page, you will know how to find halves of numbers and understand that halves are the same as dividing by 2. Success signs:
  • You can split 10 apples into 2 equal groups
  • You can say that half of 8 is 4
  • You can solve 12 ÷ 2 = ?
  • You can find half of any number up to 20

Why this matters

Halves are used everywhere! When you share a pizza with a friend, you split it into halves. When you split a cake for two people, you make halves. Understanding halves helps you share fairly, measure things, and solve maths problems. It also helps you learn bigger maths ideas like fractions later on.

How it works

Finding halves is simple:
  1. Think of a number
  2. Split it into 2 equal groups
  3. Count how many are in each group
  4. That number is half of the original
You can also find halves by dividing by 2.

Examples you can see

Let's look at some examples of halves: Halves of numbers
NumberHalves
21
42
63
84
105
126
147
168
189
2010
Example 1: You have 6 sweets. If you split them equally between 2 friends, how many sweets does each friend get?
  • Split 6 into 2 equal groups
  • Group 1: 3 sweets
  • Group 2: 3 sweets
  • Each friend gets 3 sweets
  • Half of 6 is 3
Example 2: You have 12 crayons. You want to split them equally into 2 boxes.
  • 12 ÷ 2 = 6
  • Each box gets 6 crayons
  • Half of 12 is 6
Example 3: You have 18 pencils. You split them into 2 equal groups.
  • 18 ÷ 2 = 9
  • Each group has 9 pencils
  • Half of 18 is 9

Try it as a mini adventure

Adventure: The Half-Pizza Challenge You and your friend are sharing a pizza. The pizza has 10 slices. 1st time: You count all the slices – there are 10 slices. 2nd time: You split them into 2 equal groups. 3rd time: You count how many slices are in each group. 4th time: You say, “Each of us gets 5 slices!” Mini Challenge: Now try this with 12 slices of pizza. How many slices does each person get?

Common mistakes

  • Mistake: Thinking that half of 9 is 4.
    • Why it happens: Children may not know how to split 9 into 2 equal parts.
    • Fix: Use objects like counters or draw 9 circles. Split them into 2 rows. You will see 4 and 5, not 4 and 4.
  • Mistake: Thinking that 10 ÷ 2 = 5 and 10 ÷ 5 = 2, but mixing up what halves are.
    • Why it happens: Confusing dividing by 2 with dividing by 5.
    • Fix: Remember, halves are always dividing by 2. Use your hands or counters to show 10 split into 2 groups.
  • Mistake: Not realising that half of an odd number is not a whole number.
    • Why it happens: Children think halves must be whole numbers.
    • Fix: Use fraction language like “half of 7 is 3 and a half” or “half of 9 is 4 and a half”.

Parent and carer guide

How to help at home:
  • Use everyday objects like counters, coins, or sweets to show halves
  • Ask your child to split 6 toys into 2 equal groups
  • Use simple division language: “What is half of 10?” or “If you have 12 cookies and share them with a friend, how many do you each get?”
  • Practice with the 10 times table to help with halves
  • Encourage your child to say, “Half of 10 is 5,” not just “10 ÷ 2 = 5”
What to watch for:
  • Does your child know that 10 ÷ 2 = 5?
  • Can they split 8 into 2 equal parts?
  • Do they understand that halves are always splitting into 2 equal groups?
Don’t worry if:
  • They make a mistake at first – it’s part of learning!
  • They count on their fingers – that’s normal and helpful
  • They say “half of 9 is 4 and a half” – that’s correct!

Practice questions

  1. What is half of 4?
  2. What is half of 10?
  3. What is half of 16?
  4. What is half of 18?
  5. What is half of 20?
Answers:
  1. Half of 4 is 2
  2. Half of 10 is 5
  3. Half of 16 is 8
  4. Half of 18 is 9
  5. Half of 20 is 10

FAQ

What does “halves” mean in maths?

Halves mean splitting something into 2 equal parts. Each part is one half.

How do you find half of a number?

You can split the number into 2 equal groups, or divide it by 2.

Can you find half of any number?

Yes! But if the number is odd, the answer will not be a whole number.

Why is learning halves important?

Halves help you share fairly, understand fractions, and solve division problems.

How can I practice halves at home?

You can use counters, sweets, or toys. Try splitting 12 items into 2 groups and see how many are in each group.