Note: Use it much until you have mastered the skill

the followings rules should be remembered as you practice:

Subtracting is the same thing as adding the negative.

So, whenever you subtract, rewrite the subtraction sign as + -

Then, all the the rules below still apply when performing operations.

The sign for

Always subtract and keep the sign of the higher number!

For example,

- 9 − 4 = -9 + -4 = -13 but

-5 − - 2 = -5 + -- 2 = -5 + +2 = -3 (2 negatives = a positive)

Practice makes perfect and enjoy the calculator!