The Number Line with Signed Numbers: Only addition and subtraction

We will locate on the number line the letters and place accordingly:

$L=5$

$E=-2$

Therefore:

$5-(-2)=$

We recall the rule:

$-(-x)=+x$

Now we get:

$5+2=7$

We will locate on the number line the letters and place them accordingly:

$G=1$

$B=-4$

$K=5$

Therefore:

$1-(-4)+5=$

We recall the rule:

$-(-x)=+x$

Now we get:

$1+4+5=$

$5+5=10$

We will locate on the number line the letters and place accordingly:

$K=4$

$E=-2$

Therefore:

$-4+4-(-2)=$

We recall the rule:

$-(-x)=+x$

Now we get:

$-4+4+2=$

$0+2=2$