Cambridge Primary Checkpoint
MATHEMATICS
0845/01
Paper 1
April 2022
MARK SCHEME
Maximum Mark: 40
Published
This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the
examination. It shows the basis on which Markers were instructed to award marks. It does not indicate the
details of the discussions that took place at a Markers’ meeting before marking began, which would have
considered the acceptability of alternative answers.
Mark schemes should be read in conjunction with the question paper and the End of Series Report.
Cambridge will not enter into discussions about these mark schemes.
This document has 12 pages.
IB22 05_0845_01/4RP
© UCLES 2022
[Turn over
0845/01
Primary Checkpoint – Mark Scheme
PUBLISHED
Mark scheme annotations and abbreviations
M1
A1
B1
FT
dep
oe
cao
isw
soi
© UCLES 2022
method mark
accuracy mark
independent mark
follow through after error
dependent
or equivalent
correct answer only
ignore subsequent working
seen or implied
Page 2 of 12
April 2022
and
Answer
© UCLES 2022
Finish
Start
West
North
East
South
East
South
any order
5
6
3
Answer
Answer
30
Answer
555
4
2
16
28
Answer
2
5
4
1
2
2
Page 3 of 12
27
Marks
Marks
Marks
Marks
Marks
Primary Checkpoint – Mark Scheme
PUBLISHED
Question
4
Question
3
Question
2
Question
1
Question
0845/01
Further Information
Further Information
Accept the abbreviations E and S.
1 All instructions must be correct for 1 mark.
1
Further Information
1 Both answers required for the mark.
Do not accept other equivalent fractions.
1
Further Information
1 The order of answers must be as stated.
Further Information
April 2022
© UCLES 2022
8
Question
7
Question
6
Question
0845/01
Any 3 or 4 correct entries
not less than 20
less than 20
6
27
12
multiples of 3
Answer
Page 4 of 12
23
17
not multiples of 3
B1
Marks
M1
For evidence of a complete method which includes correct
conversions, with any number of arithmetic errors. e.g.
9060 – 850
9.06 – 0.85
8 kg 1060 – 850
Marks
B1
Answer
Marks
For answers given without units e.g. 8 kg 210 or
8.21
or
For answer calculated correctly but given with incorrect final
units e.g. 8210 kg
8 kg 210 g
or
8 210 g
or
8.21 kg
48
Answer
Primary Checkpoint – Mark Scheme
PUBLISHED
Further Information
2 All 5 entries must be correct.
Further Information
Allow M1 for correct method with wrong units e.g.
9060 – 850 = 8210 kg
9.06 – 0.85 = 8.21 g
Do not accept 960 – 850
2 Answer must have the correct units.
1
Further Information
April 2022
© UCLES 2022
10
Question
9
Question
0845/01
2
3
1
3600 g, 1.2 kg, 900 g, 0.6 kg
Answer
Two correct mixed numbers.
10
3
2
4
1
3
Answer
Page 5 of 12
Marks
B1
Marks
Primary Checkpoint – Mark Scheme
PUBLISHED
Any units used must be correct with no misreads.
Accept converted units e.g.
3.6 kg, 1.2 kg, 0.9 kg, 0.6 kg
1 Allow if the numbers or their conversions are
ordered correctly with no units shown e.g.
3600 1.2 900 0.6
3600 1200 900 600
3600 1200 0.9 0.6
Further Information
Allow equivalent answers for the fraction element
of each mixed number e.g. 3 2/4
2 Award 2 marks for all 3 correct.
Further Information
April 2022
© UCLES 2022
13
Question
12
Question
11
Question
0845/01
45
645 213
<
645 123
Answer
Answer
3456
>
12 345
Answer
Page 6 of 12
Marks
Marks
Marks
Primary Checkpoint – Mark Scheme
PUBLISHED
1
Further Information
1 Accept slight inaccuracies in the drawing provided
the intention is clear.
Further Information
1 Both must be correct for the award of the mark.
Further Information
April 2022
© UCLES 2022
16
Question
15
Question
14
Question
0845/01
3 correct answers
unlikely
certain
even
impossible
304
37 21
37 19
Answer
Answer
Answer
Page 7 of 12
37 20 – 37
37 20 20
37 20 – 19
37 20 – 20
37 20 37
37 20 21
B1
Marks
Marks
Marks
Primary Checkpoint – Mark Scheme
PUBLISHED
Further Information
2 Award 2 marks for all four in the right order.
1
Further Information
1 Both lines required.
Further Information
April 2022
216 000
217 000
216 489
215 053
© UCLES 2022
An explanation that the graph does not show individual
scores but shows how many students score within each
group e.g.
18(b)
Page 8 of 12
An explanation that the graph does not show how many
students scored 10 e.g. they could have scored 8 or 9 or 10
or 11
A valid counter example e.g. All 16 students could have
scored 8 points on the test.
An explanation that the graph shows that 16 students
scored 8 to 11
27 (students)
Answer
215 000
214 598
2 or 3 correct
214 000
215 503
Answer
Marks
B1
Marks
Primary Checkpoint – Mark Scheme
PUBLISHED
18(a)
Question
17
Question
0845/01
1
1
Further Information
2 All lines required.
Further Information
April 2022
© UCLES 2022
21
Question
20
Question
19(b)
19(a)
Question
0845/01
2
12 ÷ 5
For 3 correct letters
A
C
E
5
4
2
Answer
4
17 ÷ 4
2
1
1
Mixed Number
4
2 or 3 correct answers
B
D
86 × 20
Answer
43 × 99
9÷2
Division
43 × 20
86 × 99
Page 9 of 12
2.4
4.25
4.5
Decimal
430 – 43 answer not required; ignore if incorrect.
Answer
B1
Marks
B1
Marks
Marks
Primary Checkpoint – Mark Scheme
PUBLISHED
2 Award 2 marks for 4 correct letters or clear
representation of shapes.
Further Information
2 Accept equivalent answers for the fractional part
of each mixed number.
Further Information
1 Any clear indication.
1 Accept 43 + 43 + 43 + 43 + 43 + 43 + 43 + 43 + 43
Accept 473 – 43 – 43 or 473 – 86
Further Information
April 2022
© UCLES 2022
23
Question
22
Question
0845/01
5
8
3
4
Answer
2
1
Answer
16
7
Page 10 of 12
mirror line
this order only
Marks
Marks
Primary Checkpoint – Mark Scheme
PUBLISHED
7
16 16 16 16
12 10 8
Further Information
Do not allow misreads.
Or equivalent e.g.
1 Accept slight inaccuracies in the drawing provided
the intention is clear.
1
Further Information
April 2022
© UCLES 2022
27
Question
26
Question
25
Question
24
Question
0845/01
false
true
false
even + odd + odd = odd
odd × odd = odd
odd × odd × odd = even
2
4
One part correct
B and E
and
199 (minutes)
45 × 18 = 90 × 9
5
0 . 6 25
8 5.000
Answer
Answer
Answer
Page 11 of 12
true
even × odd = even
Award 1 mark for 3 correct
true
true or false
odd + odd + odd = odd
Answer
B1
Marks
Marks
Marks
B1
Marks
Primary Checkpoint – Mark Scheme
PUBLISHED
Further Information
Do not accept 3 hours 19 (minutes)
2 Both B and E are necessary.
1
Further Information
i.e. no carry figures.
1 Accept correct answer with or without working.
Further Information
2 Award 2 marks for all 4 correct.
Accept any clear indication of the correct answer.
Further Information
April 2022
© UCLES 2022
29
Question
28
Question
0845/01
8+9+3
8 + 10 + 2
9+9+2

31.2 – 10 + 0.1
31.2 – 9.9
Answer

12.4 + 4 – 0.1
12.4 + 3.9
Page 12 of 12

13.4 – 7 – 0.2
13.4 – 6.8
 or 
Strategy
Calculation
Answer
Marks
Marks
Primary Checkpoint – Mark Scheme
PUBLISHED
1 All three must be correct for the award of the
mark.
Further Information
1 All 3 answers must be correct for 1 mark.
Further Information
April 2022