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This document consists of 13 printed pages and 3 blank pages. IB10 06_0843_01/MS © UCLES 2010 [Turn over *4114870983* UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS Cambridge International Primary Achievement Test MATHEMATICS 0842/01 Paper 1 May/June 2010 MARK SCHEME Maximum Mark : 39

2 © UCLES 2010 0842/01/MS/M/J/10 Mathematics mark schemes – Achievement Test Guidelines for marking test papers These mark schemes are designed to provide you with all the information necessary to mark the Primary Mathematics Achievement Tests. As far as possible, the mark sch\ emes give you full guidance regarding acceptable and unacceptable al ternative answers and, where appropriate, include examples of student work to illustrate the marking points. However, it \ is not always possible to predict all the alternative answers that may be produced by students and there c\ ould be places where the marker will have to use their professional judgement. In these cases it\ is essential that such judgement be applied consistently. The guidelines below should be followed throughout ( unless the mark scheme states otherwise):  A correct answer should always be awarded full marks even if the working\ shown is wrong.  Where more than one mark is available for a question the mark scheme exp\ lains where each mark should be awarded. In some cases marks are available for demonstra\ tion of the correct method even if the final answer is incorrect. The method marks can be a\ warded if the correct method is used but a mistake has been made in the calculation, resulting\ in a wrong answer. Method marks can also be awarded if the calculation is set up and perfor\ med correctly but incorrect values have been used, e.g. due to misreading the question or \ a mistake earlier in a series of calculations.  If a question uses the answer to a previous question or part question that the student answered incorrectly, all available marks can be awarded for the latter \ question if appropriate calculations are performed correctly using the value carried forward. P\ laces where such consideration should be made are indicated in the mark schemes. In thes\ e cases, it is not possible to provide all the alternative acceptable answers and the marke\ r must follow the student’s working to determine whether credit should be given or not.\  Half marks should not be awarded and at no point should an answer be awa\ rded more than the maximum number of marks available, regardless of the quality of the \ answer.  If the student has given more than one answer, the marks can be awarded \ if all the answers given are correct. However, if correct and incorrect answers are given \ together, marks should not be awarded (marks for correct working out can still be gained).  If the answer line is blank but the correct answer is given elsewhere, e\ .g. an annotation on a graph or at the end of the working out, the marks can be awarded provide\ d it is clear that the student has understood the requirements of the question.  If the response on the answer line is incorrect but the correct answer i\ s shown elsewhere, full marks can still be awarded if the student has made the error when copyin\ g the answer onto the answer line. If the incorrect final answer is the result of redunda\ nt additional working after the correct answer had been reached, the marks can be awarded provided t\ he extra work does not contradict that already done.  Each question and part question should be considered independently and m\ arks for one question should not be disallowed if they are c ontradicted by working or answers in another question or part question.

3 © UCLES 2010 0842/01/MS/M/J/10 [Turn over  Any legible crossed-out work that has not been replaced can be marked; b\ ut, if work has been replaced, the crossed-out part should be ignored.  If the student’s response is numerically or algebraically equivalent \ to the answer in the mark scheme, the mark should be given unless a particular form of answer was \ specified by the question.  Diagrams, symbols or words are acceptable for explanations or responses.\  Where students are required to indicate the correct answer in a specific\ way, e.g. by underlining, marks should be awarded for any unambiguous indication, e.g\ . circling or ticking.  Any method of setting out working should be accepted.  Standard rules for acceptable formats of answers involving units, money,\ duration and time are given overleaf. Each question on the test paper has a box beside it for the teacher to r\ ecord the mark obtained. It is advisable to use these boxes so that students, a nd others looking at the test papers, can clearly see where the marks have been awarded. It should also be noted that marking in red ink and using the mark boxes is an essential requirement for the Achievement tests. A working marksheet, together with instructions for its completion, is i\ ncluded in this mark scheme. A completed copy should be despatched with the moderation sample. General rules for alternative answers In most places on the mark schemes acceptable and unacceptable alternati\ ve answers are given in detail, however some general rules are given overleaf and are not necess\ arily repeated in full for each question that they apply.

4 © UCLES 2010 0842/01/MS/M/J/10 Number and Place Value The table shows various general rules in terms of acceptable decimal ans\ wers. Accept Accept omission of leading zero if answer is clearly shown, e.g. .675 Accept tailing zeros, unless the question has asked for a specific numbe\ r of decimal places, e.g. 0.7000 Always accept appropriate tailing zeros, e.g. 3.00m; 5.000kg Accept a comma as a decimal point if that is the co nvention that you have taught the students, e.g. 0,638 Units For questions involving quantities, e.g. length, mass, time or money, co\ rrect units must be given in the answer. The table shows acceptable and unacceptable versions of the ans\ wer 1.85m. Correct answer Also accept Do not accept Units are not given on answer line and question does not specify unit for the answer. 1.85m Correct conversions provided that the unit is stated, e.g. 1m 85cm 185cm 1850mm 0.00185km 1.85 185m If the unit is given on the answer line, e.g. ……………………………m …..1.85…… m Correct conversions, provided the unit is stated unambiguously, e.g. …..185cm….. m …..185……m …..1850.… m etc. If the question states the unit that the answer should be given in a specified unit, e.g. “Give your answer in metres” 1.85m 1.85 1m 85cm 185; 1850 Any conversions to other units, e.g. 185cm Note: if the answer line is left blank but the correct answer is given elsewh\ ere on the page, it can be marked correct if the units match those on the answer line or are unambi\ guously stated.

5 © UCLES 2010 0842/01/MS/M/J/10 [Turn over Money For questions involving money, it is essential that appropriate units ar\ e given in the answer. The table shows acceptable and unacceptable versions. Accept Do not accept If the amount is in dollars and cents, the answer should be given to two decimal places. $0.30 $9 or $9.00 If units are not given on answer line Any unambiguous indication of the correct amount, e.g. 30 cents; 30 c $0.30; $0.30c; $0.30cents $0-30; $0=30; $0:30 30 or 0.30 without a unit Incorrect or ambiguous answers, e.g. $0.3; $30; $30cents; 0.30cents If $ is shown on the answer line $....... 0.30……. $....... 0.30 cents…. Accept all unambiguous indications, as shown above $....... 30……. $....... 30 cents…. (this cannot be accepted because it is ambiguous, but if the dollar sign is deleted it becomes acceptable) If cents is shown on the answer line ....... 30…….cents ....... $0.30 …….cents ....... 0.30…….cents ....... $30…….cents Duration Accept any unambiguous method of showing duration and all reasonable abb\ reviations of hours (h, hr, hrs), minutes (m, min, mins) and seconds (s, sec, secs). Accept Do not accept Any unambiguous indication using any reasonable abbreviations of hours (h, hr, hrs), minutes (m, min, mins) and seconds (s, sec, secs), e.g. 2 hours 30 minutes; 2h 30m; 02h 30m 5 min 24 sec; 00h 05m 24s Incorrect or ambiguous formats, e.g. 2.30; 2.3; 2.30 hours; 2.30 min; 2h 3; 2.3h Any correct conversion with appropriate units, e.g. 2.5 hours; 150 mins 324 seconds 2.5; 150 324 Also accept unambiguous digital stopwatch format, e.g. 02:30:00 00:05:24; 05:24s Do not accept ambiguous indications, e.g. 02:30 5.24

6 © UCLES 2010 0842/01/MS/M/J/10 Time There are many ways to write times, in both numbers and words, and marks should be awarded for any unambiguous method. Accept time written in numbers or words unless \ there is a specific instruction in the question. Some examples are given in the table. Accept Do not accept Any unambiguous indication of correct answer in numbers, words or a combination of the two, e.g. 07:30, 19:00 0730; 07 30; 07.30; 07,30; 07-30; 7.30; 730 a.m.; 7.30am; 7.30 in the morning Half past seven (o’clock) in the morning Thirty minutes past seven am Also accept: O-seven-thirty 1900; 19 00; 19_00 etc. Nineteen hundred (hours) Seven o’clock in the afternoon/evening Accept correct conversion to 12-hour clock, e.g. 16:42 4:42 p.m. Sixteen forty two Four-forty-two in the afternoon/evening Four forty two p.m. Forty two (minutes) past four p.m. Eighteen (minutes) to five in the evening Also accept a combination of numbers and words, e.g. 18 minutes to 5 p.m. 42 minutes past 4 in the afternoon Incorrect or ambiguous formats, e.g. 07.3; 073; 07 3; 730; 73; 7.3; 7.3am; 7.30p.m 19; 190; 19 000; 19.00am; 7.00am 4.42am; 0442; 4.42 Forty two (minutes) past sixteen Eighteen (minutes) to seventeen

7 © UCLES 2010 0842/01/MS/M/J/10 [Turn over Question Mark Answer 1 3Nc13 1 170 Question Mark Answer 2 3Nn6 1 5 5 5 Question Mark Answer 3 4Ss2 1 Both must be indicated for 1 mark. Question Mark Answer 4 a 3P7 1 16 (cents) b 3P7 1 4 (cents) If part (a) incorrect, award mark if 20 minus part (a) is correct. c 3P8 1 or If part (b) incorrect, award mark if part (c) is correct follow- through from (b) using coins shown. Question Mark Answer 5 a 3Nn5 1 254 542 524 452 245 b 3Nn5 1 27 45 74 63 85

8 © UCLES 2010 0842/01/MS/M/J/10 Question Mark Answer 6 3Sp2 1 N S W E Both directions must be given to earn the mark. Question Mark Answer 7 a 3Sm3 1 300 (centimetres) b 3Sm3 1 2000 (metres) Question Mark Answer 8 3D1 1 B CA D G E F curved straight Both letters must be correct to earn the mark. Question Mark Answer 9 5Nc9 1 4 x 8 = 32 9 x 6 = 54 Both correct for 1 mark. Question Mark Answer 10 4Sp10 1 2 1 4 3

9 © UCLES 2010 0842/01/MS/M/J/10 [Turn over Question Mark Answer 11 5P1 1 13 (boxes) Question Mark Answer 12 4D4 1 20 Question Mark Answer 13 5P6 1 11 (hours) Question Mark Answer 14 4Sm4 1 650 (ml) Question Mark Answer 15 6Nc7 1 1500 Question Mark Answer 16 5Sm5 1 Any line 56 – 58 mm inclusive Do not accept if a ruler has not been used. Question Mark Answer 17 a 4Nn14 1 Any 3 squares should be shaded b 4Nn14 1 Tim c 4Nn14 1 124

10 © UCLES 2010 0842/01/MS/M/J/10 Question Mark Answer 18 5Nc4 1 12.05 Question Mark Answer 19 a 6Nn1 1 468 Accept 468.0 b 6Nn1 1 5.7 Accept 5.700 or 5.70 Question Mark Answer 20 5Sp2 1 Pair 2 are perpendicular lines. Pair 1 are parallel lines. Both sentences must be correct to earn the mark. Question Mark Answer 21 a 6Nc8 1 24.5 b 6Nc8 1 1.4 Question Mark Answer 22 a 4Sm9 1 0602 (answer shown here is written as given in timetable) Also accept: 06:02, 06.02, 6:02 am., 6.02 am. b 4Sm9 1 20 (minutes) Question Mark Answer 23 6Ss3 1 7 Question Mark Answer 24 4P1 2 21 2 marks for correct answer. If final answer is incorrect, 1 mark can be awarded if there is evidence of working out 41 of 56 = 14

11 © UCLES 2010 0842/01/MS/M/J/10 Question Mark Answer 25 a 6D4 1 5 b 6D4 1 10 c 6D5 1 9 Question Mark Answer 26 a 6P6 1 18 8 10 14 16 6 12 4 20 Both numbers must be correct to earn the mark. b 6P6 1 36

12 © UCLES 2010 0842/01/MS/M/J/10 BLANK PAGE

13 © UCLES 2010 0842/01/MS/M/J/10 BLANK PAGE

14 Permission to reproduce items where third-par ty owned material protected by copyright is included has been sought and cleared w here possible. Every reasonable effort has been made by the publis her (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opport\ unity. University of Cambridge International Examinations is part of t he Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a depa\ rtment of the University of Cambridge. © UCLES 2010 0842/01/MS/M/J/10 BLANK PAGE

15 0842/1/CW/S CAMBRIDGE INTERNATIONAL PRIMARY PROGRAMME ACHIEVEMENT TEST – MATHEMATICS PAPER 1 JUNE 2010 0842/01 Please read the instructions printed overleaf before completing this form. Centre Number Centre Name Question Number Total Mark Candidate Number Candidate Name 1 2 3 4a 4b 4c 5a 5b 6 7a 7b 8 9 10 11 12 13 14 15 16 17a 17b 17c 18 19a 19b 20 21a 21b 22a 22b 23 24 25a 25b 25c 26a 26b max 39 Teacher completing this form (BLOCK CAPITALS) Date Name of moderator (BLOCK CAPITALS) Date

16 0842/1/CW/S A. INSTRUCTIONS FOR COMPLETING WORKING MARK SHEET 1. Complete the information at the head of the form. 2. List the candidates in an order which will allow ease of transfer of information to a computer-printed mark sheet (MS1) at a later stage (i.e. in candidate index number order, where this is known). 3. Enter each candidate’s mar ks on this form as follows: a) In the question columns, enter the marks awarded. b) In the columns headed ‘Total Mark ’, enter the total mark awarded. 4. Ensure that the addition of marks is independently checked. 5. Both the teacher completing this form and the internal moderator should check the form and complete the bottom portion. B. PROCEDURES FOR EXTERNAL MODERATION 1. University of Cambridge International Examinations (CIE) sends a computer-printed mark sheet (MS1 ) to each centre showing the name and index number of each candidate. Transfer the total internally moderated mark for each candidate from this WORKING MARK SHEET to the computer-printed mark sheet (MS1). 2. Despatch the top copy of the computer-print ed mark sheet (MS1) to CIE. The deadli nes for receipt of this completed document are 15 June for the June examination and 16 November for the November examination. 3. Send samples of the candidates’ work covering the full ability range, together wit h this form and the second copy of MS1, by 15 June for the June exami nation and 16 November for the November examination. 4. If there are 10 or fewer candidates entering the Achi evement Test, send all the sc ripts for every candidate. 5. If there are more than 10 candidates, send the scripts that contributed to the final mark for the number of candidates as follows. The marks of the can didates’ work selected should cover the whole mark range with marks spaced as evenly as possible from the top mark to the lowest mark. number of candidates entered number of candidates whose work is required 11-50 51-100 above 100 10 15 20 6. If different teachers have prepared classes, select the samples from the classes of different teachers. 7. CIE reserves the right to ask fo r further samples of scripts.