### There are 18 results

Broad Topics >

Numbers and the Number System > Positive-negative numbers

##### Age 11 to 14

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

##### Age 11 to 14

How can we help students make sense of addition and subtraction of negative numbers?

##### Age 11 to 14 Challenge Level:

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

##### Age 11 to 14 Challenge Level:

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

##### Age 11 to 16 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?

##### Age 11 to 14 Challenge Level:

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

##### Age 7 to 14 Challenge Level:

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?

##### Age 11 to 14 Challenge Level:

Five numbers added together in pairs produce: 0, 2, 4, 4, 6, 8, 9, 11, 13, 15 What are the five numbers?

##### Age 7 to 14 Challenge Level:

An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.

##### Age 11 to 14 Challenge Level:

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

##### Age 14 to 16 Challenge Level:

How many intersections do you expect from four straight lines ? Which three lines enclose a triangle with negative co-ordinates for every point ?

##### Age 11 to 14

A brief history of negative numbers throughout the ages

##### Age 7 to 14 Challenge Level:

What is the smallest number of answers you need to reveal in order to work out the missing headers?

##### Age 11 to 14 Challenge Level:

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

##### Age 11 to 18

This article -useful for teachers and learners - gives a short
account of the history of negative numbers.

##### Age 14 to 16 Challenge Level:

Substitute -1, -2 or -3, into an algebraic expression and you'll
get three results. Is it possible to tell in advance which of those
three will be the largest ?

##### Age 11 to 16 Challenge Level:

The classic vector racing game.

##### Age 14 to 18 Challenge Level:

Use vectors to collect as many gems as you can and bring them safely home!