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### Number and algebra

### Geometry and measure

### Probability and statistics

### Working mathematically

### For younger learners

### Advanced mathematics

# Number Facts

### Pairs of Numbers

### Totality

### Strike it Out

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Do you want to get better at knowing number facts and being able to use these facts to work out other facts? If so, then these activities are for you. (By the way, adults may call this being 'fluent' in number.)

Age 5 to 7

Challenge Level

If you have ten counters numbered 1 to 10, how many can you put into pairs that add to 10? Which ones do you have to leave out? Why?

Age 5 to 11

Challenge Level

This is an adding game for two players. Can you be the first to reach the target?

Age 5 to 11

Challenge Level

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