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### Number and algebra

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### Advanced mathematics

# More Playing with Number Lower Primary

### 2, 4, 6, 8

### Fair Exchange

### Butterfly Flowers

### Ladybirds in the Garden

### Find the Difference

### Sort Them Out (1)

### Pairs of Numbers

### Early Number Sense

### Place Value: the Ten-ness of Ten

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Age 5 to 7

Challenge Level

Using the cards 2, 4, 6, 8, +, - and =, what number statements can you make?

Age 5 to 7

Challenge Level

In your bank, you have three types of coins. The number of spots shows how much they are worth. Can you choose coins to exchange with the groups given to make the same total?

Age 5 to 7

Challenge Level

Can you find two butterflies to go on each flower so that the numbers on each pair of butterflies adds to the number on their flower?

Age 5 to 7

Challenge Level

In Sam and Jill's garden there are two sorts of ladybirds with 7 spots or 4 spots. What numbers of total spots can you make?

Age 5 to 7

Challenge Level

Place the numbers 1 to 6 in the circles so that each number is the difference between the two numbers just below it.

Age 5 to 7

Challenge Level

Can you each work out the number on your card? What do you notice? How could you sort the cards?

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 3 to 11

This article explores the basic foundations of number sense and outlines relevant research in this area.

Age 3 to 11

This article develops the idea of 'ten-ness' as an important element of place value.