Addition and subtraction

game
Favourite

Up, Down, Flying Around

Age

11 to 14

Challenge level

1 out of 3

Play this game to learn about adding and subtracting positive and negative numbers
problem
Favourite

Number Daisy

Age

11 to 14

Challenge level

1 out of 3

Can you find six numbers to go in the daisy from which you can make all the numbers from 1 to a number bigger than 25?
problem
Favourite

Cryptarithms

Age

11 to 14

Challenge level

1 out of 3

Can you crack these cryptarithms?
problem
Favourite

Add to 200

Age

11 to 14

Challenge level

1 out of 3

By selecting digits for an addition grid, what targets can you make?
problem
Favourite

Forwards Add Backwards

Age

11 to 14

Challenge level

1 out of 3

What happens when you add a three digit number to its reverse?
problem
Favourite

Making a Difference

Age

11 to 14

Challenge level

1 out of 3

How many different differences can you make?
problem
Favourite

Weights

Age

11 to 14

Challenge level

2 out of 3

Different combinations of the weights available allow you to make different totals. Which totals can you make?
problem
Favourite

Impossibilities

Age

11 to 14

Challenge level

2 out of 3

Just because a problem is impossible doesn't mean it's difficult...
problem
Favourite

Consecutive Negative Numbers

Age

11 to 14

Challenge level

3 out of 3

Do you notice anything about the solutions when you add and/or subtract consecutive negative numbers?
problem
Favourite

Connect Three

Age

11 to 16

Challenge level

2 out of 3

In this game the winner is the first to complete a row of three. Are some squares easier to land on than others?