Positive and negative numbers

There are 23 NRICH Mathematical resources connected to Positive and negative numbers
Negative Numbers
article

Negative Numbers

A brief history of negative numbers throughout the ages
Number Lines in Disguise
problem

Number Lines in Disguise

Age
7 to 14
Challenge level
filled star filled star empty star
Some of the numbers have fallen off Becky's number line. Can you figure out what they were?