b i Candidates should be encouraged to leave out the unit of measurement from

B i candidates should be encouraged to leave out the

This preview shows page 40 - 42 out of 73 pages.

(b) (i) Candidates should be encouraged to leave out the unit of measurement from calculations and to give the correct units with their final answer. Frequently seen was, for example, 90 m 2 instead of (90 m) 2 or just 90 2 . The correct units can then be added to the final answer if not provided on the answer line. Generally this part was quite well attempted with the main loss of mark being the need to show the evaluated value of the square root of 9000 which then rounds to 95, not just showing 95. Some trigonometric methods were seen which needed to be completely correct to gain any marks which was rare. Many candidates did not attempt this question. Several candidates used the value 95 in a calculation for the perimeter and then subtracted all the other measurements from the perimeter until they got back to 95 m. Candidates should be reminded that in a ‘show that’ question they should not use the value they are being asked to show. (ii) Candidates who found the previous two parts challenging were more successful in calculating the cost of fencing the field. This part was well answered with the correct answer seen frequently. One mark was awarded often for obtaining the perimeter 455. However a large number of candidates took their answer for the area in part (a) and divided it by 5 then multiplied by 48, rather than finding the perimeter, or missed out 95 when adding the sides together. Other candidates correctly worked out the perimeter but then only multiplied by 48 and did not divide by 5 also. Answers : (a) 12 150 (b)(ii) 4368
Image of page 40
Cambridge International General Certificate of Secondary Education 0580 Mathematics November 2018 Principal Examiner Report for Teachers © 2018 MATHEMATICS Paper 0580/32 Paper 32 (Core) Key messages To succeed in this paper candidates need to have completed full syllabus coverage, remember necessary formulae, apply mathematical knowledge in a variety of situations, show all working clearly and use a suitable level of accuracy. Particular attention to mathematical terms and definitions would help a candidate to answer questions from the required perspective. General comments This paper gave all candidates an opportunity to demonstrate their knowledge and application of mathematics. Most candidates completed the paper making an attempt at most questions. The standard of presentation and amount of working shown continued to improve and was generally good. Centres should continue to encourage candidates to show formulae used, substitutions made and calculations performed. Attention should be paid to the degree of accuracy required and candidates should be encouraged to avoid premature rounding in workings. Candidates should be aware of the difference between a time and a time interval and be able to write both in a correct form. Candidates should also be encouraged to read questions again to ensure the answers they give are in the required format and answer the question set. When candidates change their minds and give a revised answer it is much better to delete the incorrect work, to rewrite their answer completely and not to attempt to overwrite their previous answer. Candidates should
Image of page 41
Image of page 42

You've reached the end of your free preview.

Want to read all 73 pages?

  • Fall '19
  • Greatest common divisor, Least common multiple, Lowest common denominator

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes