Beginner · 9 min
Negative numbers
Work with values below zero and changes in direction.
Cross zero
A negative number lies below zero. Adding a positive number moves towards larger values on the number line.
Worked example
−4 + 7 = 3
Subtract a negative
Subtracting a negative number has the same effect as adding its positive opposite.
Worked example
3 − (−2) = 3 + 2 = 5
Try it on paper
- Write down each step before entering your answer.
- Use the explanation to check your method, then try the next question.