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For digits 12.8 We are to correct placement of the decimal point following one arithmetical error: $$3 + 2.4 + 1 = 6.4$$ with an answer of 0.00128 - Edexcel - GCSE Maths - Question 4 - 2022 - Paper 1

Question 4

For-digits-12.8---We-are-to-correct-placement-of-the-decimal-point-following-one-arithmetical-error:--$$3-+-2.4-+-1-=-6.4$$-with-an-answer-of-0.00128-Edexcel-GCSE Maths-Question 4-2022-Paper 1.png

For digits 12.8 We are to correct placement of the decimal point following one arithmetical error: $$3 + 2.4 + 1 = 6.4$$ with an answer of 0.00128. For 0.00128 =... show full transcript

Worked Solution & Example Answer:For digits 12.8 We are to correct placement of the decimal point following one arithmetical error: $$3 + 2.4 + 1 = 6.4$$ with an answer of 0.00128 - Edexcel - GCSE Maths - Question 4 - 2022 - Paper 1

Step 1

Correct placement of the decimal point

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Answer

To correct the placement of the decimal point, we first add the numbers:

$3 + 2.4 + 1 = 6.4$

However, the expected outcome should have been 0.00128. This indicates that the decimal has been placed incorrectly in the final result due to a mathematical error. The correct representation of 0.00128 in scientific notation is:

$0.00128 = 1.28 \times 10^{-3}.$

Step 2

Final answer representation

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Answer

Thus, the correct representation of 0.00128 is:

$0.00128 = 1.28 \times 10^{-3}.$

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