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Positive or Negative (Add and Subtract)?

In this worksheet, students add and subtract positive and number answers to decide whether the answer is positive or negative.

'Positive or Negative (Add and Subtract)?' worksheet

Key stage:  KS 3

Curriculum topic:  Number

Curriculum subtopic:  Use Four Operations for All Numbers

Difficulty level:  

down

Worksheet Overview

QUESTION 1 of 10

Adding

When you add a positive and negative number, you need to look at the "size" or "magnitude" of the number.

-32 has a magnitude of 32 and is negative.

The answer will be positive, if the positive number has a bigger magnitude.

The answer will be negative, if the negative number has a bigger magnitude.

 

Subtracting

Remember that subtracting a negative number is the same as adding its positive.

 

When you subtract a smaller number from a larger number, the answer is positive.

When you subtract a larger number from a smaller number, the answer is negative.

 

Examples

6 - 7 is negative

7 - 6 is positive

-6 - 7 is negative

-6 + 7 is positive

-6 - -7 = -6 + 7 which is positive

Is the answer to the following calculation, positive or negative?

8 - 9

Positive

Negative

Is the answer to the following calculation, positive or negative?

18 - 9

Positive

Negative

Is the answer to the following calculation, positive or negative?

-8 + 9

Positive

Negative

Is the answer to the following calculation, positive or negative?

-8 - -9

Positive

Negative

Is the answer to the following calculation, positive or negative?

-18 - -9

Positive

Negative

Is the answer to the following calculation, positive or negative?

-18 + 19

Positive

Negative

Is the answer to the following calculation, positive or negative?

-18 + -17

Positive

Negative

Is the answer to the following calculation, positive or negative?

52 - -53

Positive

Negative

Is the answer to the following calculation, positive or negative?

-52 - -53

Positive

Negative

Is the answer to the following calculation, positive or negative?

-47 - -43

Positive

Negative

Is the answer to the following calculation, positive or negative?

47 + -43

Positive

Negative

Is the answer to the following calculation, positive or negative?

43 - 47

Positive

Negative

Is the answer to the following calculation, positive or negative?

49 - 47

Positive

Negative

Is the answer to the following calculation, positive or negative?

-47 + -43

Positive

Negative

Is the answer to the following calculation, positive or negative?

-37 - -43

Positive

Negative

Is the answer to the following calculation, positive or negative?

-67 - -43

Positive

Negative

Is the answer to the following calculation, positive or negative?

-67 + -43

Positive

Negative

Is the answer to the following calculation, positive or negative?

15 + -43

Positive

Negative

Is the answer to the following calculation, positive or negative?

125 + -143

Positive

Negative

Is the answer to the following calculation, positive or negative?

-125 - -143

Positive

Negative

  • Question 1

Is the answer to the following calculation, positive or negative?

8 - 9

CORRECT ANSWER
Negative
  • Question 2

Is the answer to the following calculation, positive or negative?

18 - 9

CORRECT ANSWER
Positive
  • Question 3

Is the answer to the following calculation, positive or negative?

-8 + 9

CORRECT ANSWER
Positive
  • Question 4

Is the answer to the following calculation, positive or negative?

-8 - -9

CORRECT ANSWER
Positive
  • Question 5

Is the answer to the following calculation, positive or negative?

-18 - -9

CORRECT ANSWER
Negative
  • Question 6

Is the answer to the following calculation, positive or negative?

-18 + 19

CORRECT ANSWER
Positive
  • Question 7

Is the answer to the following calculation, positive or negative?

-18 + -17

CORRECT ANSWER
Negative
  • Question 8

Is the answer to the following calculation, positive or negative?

52 - -53

CORRECT ANSWER
Positive
  • Question 9

Is the answer to the following calculation, positive or negative?

-52 - -53

CORRECT ANSWER
Positive
  • Question 10

Is the answer to the following calculation, positive or negative?

-47 - -43

CORRECT ANSWER
Negative
  • Question 11

Is the answer to the following calculation, positive or negative?

47 + -43

CORRECT ANSWER
Positive
  • Question 12

Is the answer to the following calculation, positive or negative?

43 - 47

CORRECT ANSWER
Negative
  • Question 13

Is the answer to the following calculation, positive or negative?

49 - 47

CORRECT ANSWER
Positive
  • Question 14

Is the answer to the following calculation, positive or negative?

-47 + -43

CORRECT ANSWER
Negative
  • Question 15

Is the answer to the following calculation, positive or negative?

-37 - -43

CORRECT ANSWER
Positive
  • Question 16

Is the answer to the following calculation, positive or negative?

-67 - -43

CORRECT ANSWER
Negative
  • Question 17

Is the answer to the following calculation, positive or negative?

-67 + -43

CORRECT ANSWER
Negative
  • Question 18

Is the answer to the following calculation, positive or negative?

15 + -43

CORRECT ANSWER
Negative
  • Question 19

Is the answer to the following calculation, positive or negative?

125 + -143

CORRECT ANSWER
Negative
  • Question 20

Is the answer to the following calculation, positive or negative?

-125 - -143

CORRECT ANSWER
Positive
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