Step by step
The question
Question: work out −12 + 7 − 4.
−12 + 7 − 4
1 Plus and minus
Plus and minus: we go from left to right.
same kind: left → right
Start at −12.
Go up 7.
We land on −5.
= −5 − 4
Start at −5.
Go down 4.
We land on −9.
= −9
So the answer is −9.
Answer
= −9