Abacus activities

Quick answer

Abacus activities use beads to help you understand numbers, place value, and basic calculations like addition and subtraction in a hands-on way.

Learning outcome

By the end of this page, you will be able to use an abacus to show numbers and solve simple addition and subtraction problems by moving beads.

• You can show numbers using beads on an abacus
• You can add and subtract using bead movements
• You understand how beads represent tens and ones
• You can solve simple problems using your abacus

Why this matters

Abacus activities help you understand numbers and maths in a fun, hands-on way. They are great for learning place value – that means understanding how many tens and how many ones make up a number. This skill helps with mental maths, and it’s also useful when you start doing bigger calculations later in school. Using an abacus also helps with fine motor skills and memory, which are helpful for all learning!

How it works

An abacus is a tool with beads on rods. Each rod has beads that can be moved to show different numbers. The beads are usually grouped into two sections:

1. Upper beads – these are usually one bead per rod and represent 5
2. Lower beads – these are usually four beads per rod and represent 1 each

To show a number:

1. Move beads to the middle bar to represent the value of each digit
2. Each rod shows one digit of the number
3. From right to left, the rods show ones, tens, hundreds, and so on

For example, to show 13:

• Move one bead from the upper section (5) and three beads from the lower section (1 + 1 + 1) on the tens rod
• Move one bead from the lower section (1) on the ones rod

Examples you can see

Let’s try a few examples using an abacus:

Example 1: Showing the number 7

On the ones rod:

• Move one bead from the upper section (5)
• Move two beads from the lower section (1 + 1)

So, 5 + 2 = 7

Example 2: Showing the number 24

On the tens rod:

• Move two beads from the lower section (1 + 1)

On the ones rod:

• Move four beads from the lower section (1 + 1 + 1 + 1)

So, 2 tens and 4>

Example 3: Adding 12 + 7

First, show 12:

• Tens rod: one bead from the upper section (5) and two from the lower (1 + 1)
• Ones rod: two beads from the lower section (1 + 1)

Now add 7:

• Move one bead from the upper section (5) on the ones rod
• Move two beads from the lower section (1 + 1) on the ones rod

Count the beads:

• On the ones rod: 5 + 2 = 7
• On the tens rod: 1 + 0 = 1

So, 12 + 7 = 19

Try it as a mini adventure

Imagine you are a young explorer in a magical land where numbers are hidden in beads on a special abacus. Your mission is to solve a treasure hunt by using the abacus to show numbers and solve puzzles.

Adventure Quest: The Treasure Hunt

1st time: You find a clue that says "I have 3 tens and 5 ones. What number am I?"

2nd time: You need to show 18 on your abacus.

3rd time: You find another clue: "Add 14 and 9. What do you get?"

4th time: You must show the answer to 27 - 13 using your abacus.

5th time: You find a treasure chest with a number 42 written on it. How do you show that?

6th time: You discover a riddle: "I am 15 more than 23. What number am I?"

Common mistakes

• Mistake: Mixing up the tens and ones rods when showing a number
• Why it happens: Not paying attention to which rod shows which digit
• Fix: Always start from the right (ones) and move to the left (tens)

• Mistake: Forgetting to use the upper bead when showing numbers 6 to 9
• Why it happens: Thinking that all numbers are shown with lower beads only
• Fix: Remember that upper beads are worth 5, so use them to make 6, 7, 8, 9

• Mistake: Not moving beads correctly when adding or subtracting
• Why it happens: Confusion about how many beads to move or in which direction
• Fix: Count carefully and always move beads towards the middle bar

Parent and carer guide

Helping your child with abacus activities is a great way to build number sense and confidence. Here’s how:

• Start by showing how to move beads to make simple numbers like 5, 7, 10
• Encourage your child to explain how they show a number on the abacus
• Use everyday situations like counting coins or snacks to practice
• Be patient – it takes time to get used to moving beads and understanding place value
• Don’t worry if they make mistakes – they are part of learning

Try this 5-minute activity: Ask your child to show numbers like 13, 20, 17, and 31 on the abacus. Then, ask them to add or subtract small numbers. This builds both understanding and confidence.

Practice questions

1. How do you show the number 9 on an abacus?
2. What number is shown if you move 2 beads from the lower section and 1 from the upper section on the tens rod?
3. What is 15 + 8?
4. How do you show 23 on the abacus?
5. What is 30 - 12?

Answers

1. Move 1 bead from the upper section (5) and 4 beads from the lower section (1 + 1 + 1 + 1)
2. 25 (2 tens + 5 ones)
3. 23
4. Move 2 beads from the lower section on the tens rod and 3 beads from the lower section on the ones rod
5. 18

FAQ

What is an abacus?

An abacus is a counting tool with beads that can be moved to show numbers and do calculations.

Why use an abacus?

An abacus helps children understand place value and develop mental maths skills by using a physical tool to represent numbers.

Can I use an abacus for bigger numbers?

Yes! An abacus can show numbers up to thousands or even millions, depending on how many rods it has.

Is it hard to learn?

It takes a little practice, but with time and hands-on use, it becomes easier and more fun!

Where can I get an abacus?

You can find abacuses in toy shops, online, or even make one at home with a wooden board and beads.