Addition and subtraction

game

First Connect Three for Two

Age

7 to 11

Challenge level

1 out of 3

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

1 out of 3

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

1 out of 3

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

1 out of 3

A number game requiring a strategy.
problem

True or False?

Age

7 to 11

Challenge level

1 out of 3

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

1 out of 3

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

1 out of 3

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

2 out of 3

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

2 out of 3

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

2 out of 3

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