Question

In a golf tournament, Lindsey scored a +3 on the first round and a minus one on the second. What was the difference between her scores in the first 2 rounds?

Answer 1

The difference is:
`4`

Explanation:

In order to solve this exercise it is important to remember that:

1. The result of a Subtraction is known as "Difference".

2. The multiplication of signs:

`(+)(+)=+\\(-)(-)=+\\(-)(+)=-\\(+)(-)=-`

According to the information given in the exercise you know that the following expression represents Lindsey's score on the first round of a golf tournament:

`a+3`

And the expression that represents Lindsey's score on the second round of that golf tournament is:

`a-1`

Therefore, you can find the difference between Lindsey's scores in those rounds by subtracting those two expressions.

Then, you get that this is:

`(a+3)-(a-1)=a+3-a+1=4`