Positive and negative numbers

problem
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?
problem
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.
article
Positive about negative numbers

In this article for teachers, Liz Woodham describes resources on NRICH that can help primary-aged children get to grips with negative numbers.
article
The history of negative numbers

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

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

A brief history of negative numbers throughout the ages
problem
Number lines in disguise

Age

7 to 14

Challenge level

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