 # 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. Key stage:  KS 3

Curriculum topic:   Number

Curriculum subtopic:   Use Four Operations for All Numbers

Difficulty level:   ### QUESTION 1 of 10

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

Negative
• Question 2

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

18 - 9

Positive
• Question 3

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

-8 + 9

Positive
• Question 4

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

-8 - -9

Positive
• Question 5

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

-18 - -9

Negative
• Question 6

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

-18 + 19

Positive
• Question 7

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

-18 + -17

Negative
• Question 8

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

52 - -53

Positive
• Question 9

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

-52 - -53

Positive
• Question 10

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

-47 - -43

Negative
• Question 11

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

47 + -43

Positive
• Question 12

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

43 - 47

Negative
• Question 13

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

49 - 47

Positive
• Question 14

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

-47 + -43

Negative
• Question 15

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

-37 - -43

Positive
• Question 16

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

-67 - -43

Negative
• Question 17

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

-67 + -43

Negative
• Question 18

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

15 + -43

Negative
• Question 19

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

125 + -143

Negative
• Question 20

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

-125 - -143

Positive
---- OR ----

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