Number and place value

What happens when you round these three-digit numbers to the nearest 100?

There are six numbers written in five different scripts. Can you sort out which is which?

Four strategy dice games to consolidate pupils' understanding of rounding.

Find out what a Deca Tree is and then work out how many leaves there will be after the woodcutter has cut off a trunk, a branch, a twig and a leaf.

How do you know whether you will reach these numbers when you count in steps of six from zero?

Each child in Class 3 took four numbers out of the bag. Who had made the highest even number?

Can you find some examples when the number of Roman numerals is fewer than the number of Arabic numerals for the same number?

Place the numbers from 1 to 9 in the squares below so that the difference between joined squares is odd. How many different ways can you do this?

Find as many different ways of representing this number of dots as you can.

In this problem, we're investigating the number of steps we would climb up or down to get out of or into the swimming pool. How could you number the steps below the water?

Add or subtract the two numbers on the spinners and try to complete a row of three. Are there some numbers that are good to aim for?

Use your knowledge of place value to try to win this game. How will you maximise your score?

In this game, you can add, subtract, multiply or divide the numbers on the dice. Which will you do so that you get to the end of the number line first?

What numbers would you put on this number line as it goes under the sea level?

Can you put the numbers 1-5 in the V shape so that both 'arms' have the same total?

You have two sets of the digits 0-9. Can you arrange these in the five boxes to make four-digit numbers as close to the target numbers as possible?

This 100 square jigsaw is written in code. It starts with 1 and ends with 100. Can you build it up?

There are nasty versions of this dice game but we'll start with the nice ones...

What happens when you add three numbers together? Will your answer be odd or even? How do you know?

This activity involves rounding four-digit numbers to the nearest thousand.

Some of the numbers have fallen off Becky's number line. Can you figure out what they were?

Look at what happens when you take a number, square it and subtract your answer. What kind of number do you get? Can you prove it?