Hint
Use the stated units and precision. Track the conversion direction and the stated position of any fixed fee.
Worked solution
(a)
Track the conversion direction and the stated position of any fixed fee.
\(200\)
Answer: \(200\)
(b)
Track the conversion direction and the stated position of any fixed fee.
\(72\)
Answer: \(72\)
(c)
Track the conversion direction and the stated position of any fixed fee.
\(185\)
Answer: \(185\)
Maths4U indicative marking guidance
Maths4U indicative marking guidance, not an official mark scheme. Credit complete valid alternative methods and consequential reasoning. An unexplained result does not earn a method mark.
(a) · 2 marks
- 1 mark: Track the conversion direction and the stated position of any fixed fee.
- 1 mark: Give the correct requested result, retaining signs, units and any domain restrictions.
Alternative methods: Any complete mathematically valid alternative method with the same restrictions and equivalent exact result is acceptable.
Common error: Keep intermediate values exact until the final step.
(b) · 2 marks
- 1 mark: Track the conversion direction and the stated position of any fixed fee.
- 1 mark: Give the correct requested result, retaining signs, units and any domain restrictions.
Alternative methods: Any complete mathematically valid alternative method with the same restrictions and equivalent exact result is acceptable.
Common error: Check the answer against the original conditions.
(c) · 2 marks
- 1 mark: Track the conversion direction and the stated position of any fixed fee.
- 1 mark: Give the correct requested result, retaining signs, units and any domain restrictions.
Alternative methods: Any complete mathematically valid alternative method with the same restrictions and equivalent exact result is acceptable.
Common error: Keep intermediate values exact until the final step.
Total: 6 marks.