# Place Value, Integers, Ordering & Rounding

This is part of our Secondary Curriculum collection of favourite rich tasks arranged by topic.

### Nice or Nasty

##### Age 7 to 14Challenge Level

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

### Dicey Operations

##### Age 11 to 14Challenge Level

Who said that adding, subtracting, multiplying and dividing couldn't be fun?

##### Age 11 to 14Challenge Level

Can you rank these sets of quantities in order, from smallest to largest? Can you provide convincing evidence for your rankings?

##### Age 11 to 14Challenge Level

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

##### Age 11 to 14Challenge Level

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

### Farey Sequences

##### Age 11 to 14Challenge Level

There are lots of ideas to explore in these sequences of ordered fractions.

### Legs Eleven

##### Age 11 to 14Challenge Level

Take any four digit number. Move the first digit to the end and move the rest along. Now add your two numbers. Did you get a multiple of 11?

### How Many Miles to Go?

##### Age 11 to 14Challenge Level

How many more miles must the car travel before the numbers on the milometer and the trip meter contain the same digits in the same order?

### Difference Sudoku

##### Age 14 to 16Challenge Level

Use the differences to find the solution to this Sudoku.

### Number Lines in Disguise

##### Age 7 to 14Challenge Level

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

### Place Value, Integers, Ordering and Rounding - Short Problems

##### Age 11 to 16

A collection of short problems on place value, integers, ordering and rounding.

### Subtraction Surprise

##### Age 7 to 14Challenge Level

Try out some calculations. Are you surprised by the results?

### More Less Is Morelive

##### Age 7 to 14Challenge Level

In each of these games, you will need a little bit of luck, and your knowledge of place value to develop a winning strategy.

You may also be interested in this collection of activities from the STEM Learning website, that complement the NRICH activities above.