Resources tagged with Positive-negative numbers similar to Pair Sums:
Other tags that relate to Pair Sums
Positive-negative numbers. smartphone. Trial and improvement. Resilient. Interactivities. Visualising. Games. Working systematically. Selecting and using information. Addition & subtraction.There are 19 results
Broad Topics > Numbers and the Number System > Positive-negative numbers
Pair Sums
Stage: 3 Challenge Level: 
Five numbers added together in pairs produce: 0, 2, 4, 4, 6, 8, 9, 11, 13, 15 What are the five numbers?
First Connect Three for Two
Stage: 2 and 3 Challenge Level:
First Connect Three game for an adult and child. Use the dice numbers and either addition or subtraction to get three numbers in a straight line.
Consecutive Numbers
Stage: 2 and 3 Challenge Level:
An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.
Consecutive Negative Numbers
Stage: 3 Challenge Level:
Do you notice anything about the solutions when you add and/or subtract consecutive negative numbers?
Strange Bank Account (part 2)
Stage: 3 Challenge Level:
Investigate different ways of making £5 at Charlie's bank.
Weights
Stage: 3 Challenge Level:
Different combinations of the weights available allow you to make different totals. Which totals can you make?
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?
Strange Bank Account
Stage: 3 Challenge Level:
Imagine a very strange bank account where you are only allowed to do two things...
Up, Down, Flying Around
Stage: 3 Challenge Level:
Play this game to learn about adding and subtracting positive and negative numbers
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?
Making Sense of Positives and Negatives
Stage: 3
This article suggests some ways of making sense of calculations involving positive and negative numbers.
Adding and Subtracting Positive and Negative Numbers
Stage: 3
How can we help students make sense of addition and subtraction of negative numbers?
Missing Multipliers
Stage: 3 Challenge Level:
What is the smallest number of answers you need to reveal in order to work out the missing headers?
Minus One Two Three
Stage: 4 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
Stage: 3, 4 and 5
This article -useful for teachers and learners - gives a short account of the history of negative numbers.
Negatively Triangular
Stage: 4 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 ?
NRICH is part of the family of activities in the Millennium Mathematics Project.