AQA · Mathematics · 8300
GCSE Maths: Number: using calculations
Number · AQA GCSE Maths (8300). Cards are generated from the Corbettmaths textbook exercise and practice questions for Number: using calculations (Corbettmaths Video 222), and every card links back to the exact page it came from. Practice tests are drawn from this deck’s own cards. Source material © Corbettmaths — used with attribution.
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If 18 × 25 = 450, what is 450 ÷ 18?
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25. Division is the inverse of multiplication, so dividing the product by one factor gives the other factor.
If 18 × 25 = 450, what is 180 × 25?
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4500. Multiplying one factor by 10 multiplies the product by 10.
If 18 × 25 = 450, what is 1.8 × 2.5?
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4.5. Dividing both factors by 10 divides the product by 100.
If 30 × 22 = 660, what is 30 × 44?
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1320. Doubling one factor doubles the product.
If 30 × 22 = 660, what is 15 × 22?
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330. Halving one factor halves the product.
If 29 × 46 = 1334, what is 30 × 46?
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1380. Increasing one factor by 1 increases the product by the value of the other factor (add 46).
If 3088 ÷ 193 = 16, what is 3088 ÷ 16?
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193. If a ÷ b = c, then a ÷ c = b.
If 96 × 24 = 2304, how can you use this to find 48 × 48?
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2304. Halve one factor (96 ÷ 2 = 48) and double the other (24 × 2 = 48); the product remains the same.
When multiplying decimals, if you divide both factors by 10, how does the product change?
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The product is divided by 100 (10 × 10).
When dividing, if both the dividend and divisor are divided by the same number, what happens to the quotient?
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The quotient remains unchanged.
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