# Place Value, Integers, Ordering & Rounding

### Up, Down, Flying Around

##### Stage: 3 Challenge Level:

Play this game to learn about adding and subtracting positive and negative numbers

### Strange Bank Account

##### Stage: 3 Challenge Level:

Imagine a very strange bank account where you are only allowed to do two things...

### Strange Bank Account (part 2)

##### Stage: 3 Challenge Level:

Investigate different ways of making £5 at Charlie's bank.

### Playing Connect Three

##### Stage: 3 Challenge Level:

In this game the winner is the first to complete a row of three. Are some squares easier to land on than others?

### First Connect Three

##### Stage: 2 and 3 Challenge Level:

The idea of this game is to add or subtract the two numbers on the dice and cover the result on the grid, trying to get a line of three. Are there some numbers that are good to aim for?

### Consecutive Negative Numbers

##### Stage: 3 Challenge Level:

Do you notice anything about the solutions when you add and/or subtract consecutive negative numbers?

### Weights

##### Stage: 3 Challenge Level:

Different combinations of the weights available allow you to make different totals. Which totals can you make?

### Nice or Nasty

##### Stage: 2 and 3 Challenge Level:

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

### Dicey Operations

##### Stage: 2 and 3 Challenge Level:

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

### Always a Multiple?

##### Stage: 3 Challenge Level:

Think of a two digit number, reverse the digits, and add the numbers together. Something special happens...

### Magic Letters

##### Stage: 3 Challenge Level:

Charlie has made a Magic V. Can you use his example to make some more? And how about Magic Ls, Ns and Ws?

### Making Sense of Positives and Negatives

##### Stage: 3

This article suggests some ways of making sense of calculations involving positive and negative numbers.

### Difference Sudoku

##### Stage: 3 and 4 Challenge Level:

Use the differences to find the solution to this Sudoku.

### A Question of Scale

##### Stage: 4 Challenge Level:

Use your skill and knowledge to place various scientific lengths in order of size. Can you judge the length of objects with sizes ranging from 1 Angstrom to 1 million km with no wrong attempts?

### Making a Difference

##### Stage: 3 Challenge Level:

How many different differences can you make?

##### Stage: 3 Challenge Level:

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

##### Stage: 3 Challenge Level:

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

### Place Value, Integers, Ordering and Rounding Stage 3 - Short Problems

##### Stage: 3

A collection of short Stage 3 problems on place value, integers, ordering and rounding.

### Place Value, Ordering and Rounding Stage 4 - Short Problems

##### Stage: 4

A collection of short Stage 4 problems on place value, ordering and rounding.

### Reverse Ages

##### Stage: 3 Short Challenge Level:

When is the next time that Brian's age will be the reverse of his father's age?

### Missing 9s

##### Stage: 3 Short Challenge Level:

Sara makes a list of the whole numbers that do not contain any 9s. What is the 300th number on her list?