Question

How do you simplify `25 + "-"45`?

Answer 1

`25+(-45)=color(green)(-20)`

Explanation:

In general `a+(-b)` is the same as `a-b`

So `25+(-45)` is the same as `25-45`

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If you have difficulty subtracting a larger number from a smaller number:

Remember, in general `(a-b)` is the same as `-(b-a)`

So
`color(white)("XXX")25-45=-(45-25)=-(20)`