Question

How do you simplify `1-4+5-(-2)`?

Answer 1

4

Explanation:

We use BIDMAS. This stands for:
Brackets
Indices
Division
Multiplication
Addition
Subtraction.

Even though it might seem as though Multiplication goes after Division and Subtraction after addition, they are at the same level, so you'd follow a left-to-right order.

So, we first do Brackets:
We have `-(-2)`. This equals `2`.
No Indices, Divisions, or Multiplications, so we pass into Addition and Subtraction:
`1-4+5-(-2)`, but we've done Brackets:
`1-4+5+2`.
We then follow a left-to-right order:
`1-4=-3`
`-3+5=2`
`2+2=4`. So, we are left with `1-4+5-(-2)` being equal to:
`4`.