Maths Quiz - Level 5-6 Numbers - Negatives - Multiplication and Division (Answers)
Multiplication and division aren't everyone's favourites in KS3 Maths, and the same goes for negative numbers. But mixing them isn't as tough as it sounds – it's quite straightforward if you remember the rules.
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There's a saying that two negatives make a positive, and it's true! When multiplying or dividing negative numbers, the rules are the same as with normal numbers, except for one thing. If the signs are the same (+ and + or - and -), the result is positive. If they're different (+ and -), the result is negative. For example:
8 x 2 = 16
-8 x 2 = -16
-8 x -2 = 16
8 ÷ 2 = 4
-8 ÷ 2 = -4
-8 ÷ -2 = 4
Remember this rule, and you'll be on the right track. Now, challenge yourself with the quiz on multiplying and dividing negative numbers.
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You can find more about this topic by visiting BBC Bitesize - How to multiply and divide positive and negative numbers
A negative x a positive = a negative
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BOTH numbers are negative, therefore the result will be positive
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9 would also work but that wasn't on the list of answers!
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One negative and one positive number equals a negative result
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A negative ÷ a negative = a positive
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It gets a little more complicated when there are more than two numbers involved!
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Note that although the first two negative signs become positive (-4 x -4 = 16), when multiplied by the third negative sign the result will be negative
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-88 ÷ 11 = -8 and -8 ÷ -2 = 4
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The calculation in brackets is a negative ÷ a negative so the answer will be a positive. We then divide this positive by a negative so the answer will be a negative
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Most calculators have a '+/-' button which gives a negative number
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