Adding and Subtracting Negative Numbers — Free KS3 Worksheet
A free, printable KS3 worksheet on adding and subtracting negative numbers, with a full worked answer key. 16 questions graded easy to hard for Years 7, 8 and 9, building from counting past zero up to two signs together and worded temperature and lift problems.
The companion worksheet for the adding and subtracting negative numbers lesson. A number line does most of the work here: adding moves you right, subtracting moves you left, and when two signs end up sitting together they become one. The questions build from counting back past zero, through adding a negative (which is just subtracting) and subtracting a negative (which makes the answer bigger), up to mixed signs and two worded questions about temperature and a lift. Every one comes with a full worked answer so you can mark it together. No calculator needed.