(+7)−(−6.7)= (+7)-(-6.7)= (+7)−(−6.7)=
Let's remember the rule:
−(−x)=+x -(-x)=+x −(−x)=+x
Now let's write the exercise in the appropriate form and solve it:
7+6.7=13.7 7+6.7=13.7 7+6.7=13.7
13.7 13.7 13.7