Addition and subtraction

game

First Connect Three for Two

Age

7 to 11

Challenge level

First Connect Three game for an adult and child. Use the dice numbers and either addition or subtraction to get three numbers in a straight line.
problem

Folded Number Line

Age

7 to 11

Challenge level

When I fold a 0-20 number line, I end up with 'stacks' of numbers on top of each other. These challenges involve varying the length of the number line and investigating the 'stack totals'.
problem

Sticky Dice

Age

7 to 11

Challenge level

Throughout these challenges, the touching faces of any adjacent dice must have the same number. Can you find a way of making the total on the top come to each number from 11 to 18 inclusive?
game

Sumo

Age

7 to 11

Challenge level

A number game requiring a strategy.
problem

True or False?

Age

7 to 11

Challenge level

Without doing lots of calculations, can you decide which of these number sentences are true? How do you know?
problem

Mathdoku

Age

7 to 11

Challenge level

Complete the Mathdoku grid using the clues. Can you convince us that the number you have chosen for each square has to be correct?
problem

Five More Coins

Age

7 to 11

Challenge level

Could Ben have any amount of money between 5p and £2 in his pocket if he has five coins?
$Build it \Up more$

problem

Build It Up More

Age

7 to 11

Challenge level

This task follows on from Build it Up and takes the ideas into three dimensions!
problem

Diagonal in a Spiral

Age

7 to 11

Challenge level

Investigate the totals you get when adding numbers in threes on the diagonal of this pattern.
problem

What Distance?

Age

7 to 11

Challenge level

Can you use addition and subtraction to answer these questions about real-life distances?