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  4. Level 3-4 Numbers - Negative Numbers - Addition and Subtraction
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Level 3-4 Numbers - Negative Numbers - Addition and Subtraction
Minus 3 plus 8 equals 5.

Level 3-4 Numbers - Negative Numbers - Addition and Subtraction

Let's chat about negative or minus numbers - they're a big deal in KS3 Maths! Integers are whole numbers, and they can be positive or negative. Positive numbers are above zero, and negatives are below, written with a minus sign. This quiz is all about diving into addition and subtraction with negative numbers!

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You might wonder why we need negatives, but they're everywhere, especially in temperatures. Anything colder than freezing is a negative Celsius number. Want to figure out how much warmer 16°C is than -5°C? You'll need to rock adding and subtracting negatives. It can be tricky, but here's a trick: rearrange the problem, like 21 - 16 = 5, so 16 - 21 = -5.

Practice makes perfect! Try this quiz and make adding and subtracting negatives second nature. You'll be a pro in no time!

1.
What is 4 - -17?
-21
-13
13
21
You could re-write the calculation as 4 + 17
2.
What is -4 - -17?
-21
-13
13
21
When two minus signs occur together, they act as a plus sign
3.
What is -3 + 8?
-11
0
3
5
Re-arrange the problem to 8 - 3
4.
What is 50 - -11 + -3?
39
41
58
61
Two negatives cancel each other out. So, 50 - -11 + -3 is the same as 50 + 11 - 3
5.
What is -66 + -33 - -22?
-77
-44
44
77
On a number line, count to the left for negative numbers and right for positive numbers
6.
What is 8 + -3?
-11
0
5
11
8 + -3 is the same as 8 - 3
7.
What is -21 + 14 + -9?
-18
-16
18
35
It's useful to use a number line with 0 in the centre
8.
What is -4 - 17?
-21
-13
13
21
Subtracting two negative numbers is similar to adding two positive numbers - just remember that the answer will be a negative number
9.
Which of the following numbers is more than -74?
-73
-75
-100
-174
Remember, negative number values get smaller the higher the numbers get
10.
Which of the following numbers is less than -3?
0
-1
-2
-4
The higher the number, the lower the negative number
You can find more about this topic by visiting BBC Bitesize - Positive and negative numbers

Author:  Frank Evans
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