Standard form arithmetic
Edexcel GCSE Maths revision on Standard form arithmetic. Aligned to the Pearson Edexcel GCSE Mathematics 1MA1 specification. This bank has 16 practice questions on this topic.
Sample questions (3 of 16)
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Question 1
What is the value of 3 times 10 to the power of 4 multiplied by 2 times 10 to the power of 2?
- A) 6 times 10 to the power of 6
- B) 5 times 10 to the power of 6
- C) 6 times 10 to the power of 8
- D) 5 times 10 to the power of 8
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Answer: 6 times 10 to the power of 6
The correct answer is 6 times 10 to the power of 6. You calculate this by multiplying 3 and 2 to get 6, then adding the exponents 4 and 2 to get 6. A common error is multiplying the exponents instead of adding them.
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Question 2
What is the result of dividing 8 times 10 to the power of 7 by 2 times 10 to the power of 3?
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Answer: 40000
The correct answer is 40000. Dividing 8 by 2 gives 4, and subtracting the exponents 7 minus 3 gives 4, resulting in 4 times 10 to the power of 4, which is 40000.
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Question 3
Which expression represents the sum of 2 times 10 to the power of 3 and 4 times 10 to the power of 3?
- A) 6 times 10 to the power of 3
- B) 6 times 10 to the power of 6
- C) 8 times 10 to the power of 3
- D) 8 times 10 to the power of 6
Show answer
Answer: 6 times 10 to the power of 3
The correct answer is 6 times 10 to the power of 3. You simply add the coefficients 2 and 4 because the powers of 10 are identical. A common mistake is to add the exponents, which is only valid for multiplication.
Want to test yourself on the remaining cards for this topic?
13 more questions on Standard form arithmetic — plus mistakes tracking and spaced repetition across the whole Maths spec.