Addition and Subtraction

Super Shapes

Age 7 to 11 Short
Challenge Level

The value of the circle changes in each of the following problems. Can you discover its value in each problem?

Space Distanceslive

Age 7 to 11
Challenge Level

This task focuses on distances travelled by the asteroid Florence. It's an opportunity to work with very large numbers.

Strike it Out

Age 5 to 11
Challenge Level

Use your addition and subtraction skills, combined with some strategic thinking, to beat your partner at this game.

It Was 2010!

Age 5 to 11
Challenge Level

If the answer's 2010, what could the question be?

Consecutive Numbers

Age 7 to 14
Challenge Level

An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.

Fifteen Cards

Age 7 to 11
Challenge Level

Can you use the information to find out which cards I have used?

Play to 37

Age 7 to 11
Challenge Level

In this game for two players, the idea is to take it in turns to choose 1, 3, 5 or 7. The winner is the first to make the total 37.

Build it Up

Age 7 to 11
Challenge Level

Can you find all the ways to get 15 at the top of this triangle of numbers? Many opportunities to work in different ways.

Buying a Balloon

Age 7 to 11
Challenge Level

Lolla bought a balloon at the circus. She gave the clown six coins to pay for it. What could Lolla have paid for the balloon?

Subtraction Surprise

Age 7 to 14
Challenge Level

Try out some calculations. Are you surprised by the results?

Ordering Journeyslive

Age 7 to 11
Challenge Level

How would you put these journey lengths in order? Give a bit of a place value challenge with subtractions set out not as a calculation.

Reach 100

Age 7 to 14
Challenge Level

Choose four different digits from 1-9 and put one in each box so that the resulting four two-digit numbers add to a total of 100.

Sealed Solution

Age 7 to 11
Challenge Level

Ten cards are put into five envelopes so that there are two cards in each envelope. The sum of the numbers inside it is written on each envelope. What numbers could be inside the envelopes?

Got It

Age 7 to 14
Challenge Level

A game for two people, or play online. Given a target number, say 23, and a range of numbers to choose from, say 1-4, players take it in turns to add to the running total to hit their target.

Make 37

Age 7 to 14
Challenge Level

Four bags contain a large number of 1s, 3s, 5s and 7s. Pick any ten numbers from the bags above so that their total is 37.

Finding Fifteen

Age 7 to 11
Challenge Level

Tim had nine cards each with a different number from 1 to 9 on it. How could he have put them into three piles so that the total in each pile was 15?

Roll These Dice

Age 7 to 11
Challenge Level

Roll two red dice and a green dice. Add the two numbers on the red dice and take away the number on the green. What are all the different possible answers?

Maze 100

Age 7 to 11
Challenge Level

Can you go through this maze so that the numbers you pass add to exactly 100?

Domino Square

Age 7 to 11
Challenge Level

Use the 'double-3 down' dominoes to make a square so that each side has eight dots.

Six Ten Total

Age 7 to 11
Challenge Level

This challenge combines addition, multiplication, perseverance and even proof.

Six Numbered Cubes

Age 7 to 11
Challenge Level

This task combines spatial awareness with addition and multiplication.

Amy's Dominoes

Age 7 to 11
Challenge Level

Amy has a box containing domino pieces but she does not think it is a complete set. Which of her domino pieces are missing?

Twenty Divided Into Six

Age 7 to 11
Challenge Level

Katie had a pack of 20 cards numbered from 1 to 20. She arranged the cards into 6 unequal piles where each pile added to the same total. What was the total and how could this be done?

What Distance?live

Age 7 to 11
Challenge Level

This task gives an opportunity to perform some subtractions in a slightly realistic situation.

Dice in a Corner

Age 7 to 11
Challenge Level

How could you arrange at least two dice in a stack so that the total of the visible spots is 18?

4 Dom

Age 5 to 16
Challenge Level

Use these four dominoes to make a square that has the same number of dots on each side.