Question

What does [ ] mean in math? ​

Answer 1

it is a bracket used in maths

Answer 2

They are kind of like outer brackets, so if you have some expression like this:

5 + (4 × 6 + (7 - 8)),

it's better to write it like this:

5 + [4 × 6 + (7 - 8)],

so you can read it more easily.