Adding and Subtracting Practice

2 + 2 = ?

both numbers are positive so you add

2 + 2 = 4

both numbers are positive so your answer is positive

4 + -2 = ?

When one number is negative and the other is positive, you will SUBTRACT the smaller number from the bigger number

4 - 2 = 2

To find out if your answer is negative or positive, look at the bigger number in the equation 4 + - 2 =

The bigger number is 4, and it is positive, so your answer is positive

- 8 + 2 = ?

When one number is negative and the other is positive, you will subtract the smaller number from the bigger number

8 - 2 = 6

To find out if your answer is negative or positive, look at the bigger number in the problem - 8 + 2 = 

The bigger number is 8 and it is negative, so your answer will be negative

-8 + 2 = -6

- 4 + - 5 =

When adding two negative numbers, you just add

4 + 5 = 9

Since both numbers are negative, your answer is negative

- 4 + - 5 = -9

Change subtraction problem into addition

5 - 7 = 

change it to 5 + - 7 =

Since one number is negative and one is positive, you will subtract the smaller number from the bigger one

7 - 5 = 2

Look at the bigger number in the problem 5 + - 7

7 is bigger and it is negative so your answer is negative. 5 + - 7 = -2