Standard Form: WJEC GCSE Higher November 2022 Unit 1 Q7

Higher November 2022 Unit 1 Q7

WJECHigherCurrent spec4 marksStandard Form

(a) Calculate the value of \((3 \times 10^4) \div (6 \times 10^{-3})\).
Give your answer in standard form. [2]

(b) Calculate the value of \((4{\cdot}78 \times 10^4) + (1{\cdot}5 \times 10^2)\).
Give your answer in standard form. [2]

Mark scheme (a)

Scheme	Marks	Comments
\(5(\cdot 0) \times 10^6\)	B2	Mark final answer. Award B1 for one of the following: sight of \(0{\cdot}5 \times 10^7\) sight of 5 000 000 equivalent correct value but not in standard form. sight of 30 000 AND 0·006 \(5 \times 10^n\) (\(n \geqslant 3\), but not 6), following one place value error in one of the given numbers.

Mark scheme (b)

Scheme	Marks	Comments
\(4{\cdot}795(0) \times 10^4\)	B2	Mark final answer. B1 for one of the following: sight of \(479{\cdot}5(0) \times 10^2\) \(4{\cdot}8(0) \times 10^4\) sight of 47 950 equivalent correct value but not in standard form. sight of 47800 AND 150 ‘their 47 950’ is written correctly in standard form, following one place value error in one of the given numbers or in the addition of 47800 AND 150.