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### Number and algebra

### Geometry and measure

### Probability and statistics

### Working mathematically

### For younger learners

### Advanced mathematics

# Playing with Number

### One Big Triangle

### Noah

### Ladybirds in the Garden

### Strike it Out

### Zios and Zepts

### Highest and Lowest

### This Pied Piper of Hamelin

### Four Goodness Sake

### What Are Numbers?

Links to the University of Cambridge website
Links to the NRICH website Home page

Nurturing young mathematicians: teacher webinars

30 April (Primary), 1 May (Secondary)

30 April (Primary), 1 May (Secondary)

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We know it's important for children to play around with numbers, big and small, as this exploration can lead to a deeper realisation of the way the world of numbers fits together. We've chosen some tasks that are exploratory whilst supporting understanding of the four calculations.

Age 5 to 7

Challenge Level

Make one big triangle so the numbers that touch on the small triangles add to 10.

Age 5 to 7

Challenge Level

Noah saw 12 legs walk by into the Ark. How many creatures did he see?

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 11

Challenge Level

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

Age 7 to 11

Challenge Level

On the planet Vuv there are two sorts of creatures. The Zios have 3 legs and the Zepts have 7 legs. The great planetary explorer Nico counted 52 legs. How many Zios and how many Zepts were there?

Age 7 to 11

Challenge Level

Put operations signs between the numbers 3 4 5 6 to make the highest possible number and lowest possible number.

Age 7 to 11

Challenge Level

Investigate the different numbers of people and rats there could have been if you know how many legs there are altogether!

Age 7 to 11

Challenge Level

Use 4 four times with simple operations so that you get the answer 12. Can you make 15, 16 and 17 too?

Age 7 to 18

Ranging from kindergarten mathematics to the fringe of research
this informal article paints the big picture of number in a non
technical way suitable for primary teachers and older students.