Resources tagged with Positive-negative numbers similar to Pair Sums:
Other tags that relate to Pair Sums
Working systematically. Selecting and using information. Visualising. Addition & subtraction. Resilient. Factors and multiples. Games. Positive-negative numbers. Trial and improvement. Interactivities.There are 19 results
Broad Topics > Numbers and the Number System > Positive-negative numbers
Pair Sums
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?
Weights
Age 11 to 14 Challenge Level:
Different combinations of the weights available allow you to make different totals. Which totals can you make?
Consecutive Numbers
Age 7 to 14 Challenge Level:
An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.
Consecutive Negative Numbers
Age 11 to 14 Challenge Level:
Do you notice anything about the solutions when you add and/or subtract consecutive negative numbers?
First Connect Three
Age 7 to 14 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?
Making Sense of Positives and Negatives
Age 11 to 14
This article suggests some ways of making sense of calculations involving positive and negative numbers.
Adding and Subtracting Positive and Negative Numbers
Age 11 to 14
How can we help students make sense of addition and subtraction of negative numbers?
Strange Bank Account
Age 11 to 14 Challenge Level:
Imagine a very strange bank account where you are only allowed to do two things...
Playing Connect Three
Age 11 to 14 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?
Missing Multipliers
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?
Up, Down, Flying Around
Age 11 to 14 Challenge Level:
Play this game to learn about adding and subtracting positive and negative numbers
Strange Bank Account (part 2)
Age 11 to 14 Challenge Level:
Investigate different ways of making £5 at Charlie's bank.
Negatively Triangular
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 ?
Minus One Two Three
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 ?
The History of Negative Numbers
Age 11 to 18
This article -useful for teachers and learners - gives a short account of the history of negative numbers.
Vector Gem Collector
Age 14 to 18 Challenge Level:
Use vectors to collect as many gems as you can and bring them safely home!
NRICH is part of the family of activities in the Millennium Mathematics Project.