Cambridge Primary Checkpoint
MATHEMATICS
0845/01
Paper 1
October 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 10 pages. Any blank pages are indicated.
IB22 10_0845_01/3RP
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[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 10
October 2022
0845/01
Primary Checkpoint – Mark Scheme
PUBLISHED
Question
Answer
October 2022
Marks
1
Further Information
1
9
2
16 (cm) ± 0.5 cm
1 Accept answers in the range 15.5 cm to 16.5 cm
inclusive.
Accept equivalent answers using different linear
units provided the units are clearly stated.
3
($) 118
2
M1
2 × (85 – 26) = wrong answer
4
53
1
5
4×3
3×4
1 Either order.
Both answers correct for the mark.
6
2.75 (kg)
1
7
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Correct method with arithmetical errors.
7 (boxes)
Accept 2
3
4
(kg)
1 Correct answer only.
Page 3 of 10
0845/01
Primary Checkpoint– Mark Scheme
PUBLISHED
Question
Answer
October 2022
Marks
Further Information
8
5
1
9
(5, 1)
1
10
4.73
>
4.65
3.21
>
3.09
5.07
<
5.1
x y
Allow (5 , 1)
but not (5x , 1y)
1 All three answers correct for the mark.
11
720 (g)
1 Accept equivalent with correct units e.g. 0.720 kg.
12
150
1
13
14
2.3
2.7
3
3.3
×
4.7
7
×
6.3
3
6.7
×
1 Both numbers circled for the mark.
Accept any clear indication.
8.7
2 Award 2 marks for all four boxes correct.
5
The numbers 3, 7, 3 and 5 can be in any order.
Accept 9 x 7 x 5 x 1 (all boxes completed)
B1
one correct pair of factors of 21 or 15:
3 and 7 in any order
or
3 and 5 in any order
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Page 4 of 10
Allow 9 x 7 x 5 with a blank box.
0845/01
Primary Checkpoint– Mark Scheme
PUBLISHED
Question
Answer
October 2022
Marks
Further Information
15
63 900
1
16
11 or 19
1
17
3 (hours) 35 (minutes)
1 Accept 0 hours 215 minutes.
Accept 20 hours 25 minutes (next day).
18
30 × 90
40 × 80
50 × 70
60 × 60
1 Allow 2700, 3200, 3500, 3600
cao
Do not allow 270, 320, 350, 360
19
3
7
3
10
1
2
4
2
5
4
3
any two correct lines
20
0.2
2
5
0.4
0.4
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2 Accept slight inaccuracies provided the intention
is clear.
1
4
B1
2
5
0.2
0.75
1
4
2
5
Page 5 of 10
1 Allow if the blank card in the question is correctly
filled in and no other card circled.
0845/01
Primary Checkpoint– Mark Scheme
PUBLISHED
Question
21
Answer
Dinosaur
Height in cm
Marks
October 2022
Further Information
2 Award 2 marks for all four measurements correct.
Height in m
Answers must only be written in metres.
500
5
820
8.2
50
0.5
480
4.8
Diplodocus
Triceratops
Velociraptor
Tyrannosaurus Rex
any two or three measurements correct
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B1
Page 6 of 10
0845/01
Primary Checkpoint – Mark Scheme
PUBLISHED
Question
Answer
Marks
Further Information
22
0.83
1
23
‘No’
and
an explanation showing that, although bar is twice as tall,
the scale starts at 40 not at zero, e.g.
• 60 is not double 50.
• Saturday is twice as long as the bar for Thursday, but it
does not represent twice as many visitors because the
scale does not start at zero.
1 Allow accurate reading of graph i.e. Thursday 50
and Saturday 60
OR
An implication that both readings have been
made correctly, e.g.
If Saturday’s reading was twice Thursday’s it
would be 100 and not 60
24
25 (red flowers)
2
25
e.g.
[45 ÷ (5 + 4)] × 5
M1
For a correct method containing any number of
arithmetic errors.
sight of 20 white flowers with no evidence of an incorrect
method
B1
No mark for 20 red flowers.
6 and 8 or 1 and 6
2 Allow a correct list e.g. 3, 6, 6, 8 or 1, 6, 3, 6
any two numbers which together with 3 and 6 have a range B1
of 5
e.g. (3, 6,) 3, 8
OR
any two numbers which with together with 3 and 6 have a
mode of 6
e.g. (3, 6,) 6, 6
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October 2022
Page 7 of 10
0845/01
Primary Checkpoint– Mark Scheme
PUBLISHED
Question
Answer
October 2022
Marks
26
Further Information
1 Accept slight inaccuracies in the drawing provided
the intention is clear.
mirror line
27
1.31
1
28
54
0.54
90
9
2
any two or three correct
29
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B1
2 Accept answers written on diagram.
110 (°)
e.g. (180 − 70 − 70) + 70 = wrong answer
M1
Sight of 40 (°)
B1
Page 8 of 10
Correct method with wrong answer.
0845/01
Primary Checkpoint Primary – Mark Scheme
PUBLISHED
Question
30
Answer
Marks
7.4 + 2.7
7.4 + 3 – 0.3

10.2 – 6.8
10.2 – 7 + 0.2

23.5 – 8.9
23.5 – 9 – 0.1

2.8 + 13.6
13.6 + 3 + 0.2

any three correct
31
© UCLES 2022
October 2022
Further Information
2 Award 2 marks for all four answers correct.
Accept alternative indications, e.g. ‘correct’ and
‘not correct’.
B1
288
and
an explanation that shows how the total of 18 can be made
using only the given number facts, e.g.
• 10 + 10 – 2 = 18
• 10 + 2 + 2 + 2 + 2 = 18
or
an explanation that uses only given products, e.g.
• 160 + 160 − 32 = 288
• 160 + 32 + 32 + 32 + 32 = 288
Page 9 of 10
1 Do not award the mark for evidence of:
• a 2-digit number being multiplied by a 2-digit
number
• repeated addition of 16 only.
Allow 32 + 80 + 160 +16
OR
2 + 5 + 6 +1
Using 1 x 16
0845/01
Primary Checkpoint – Mark Scheme
PUBLISHED
BLANK PAGE
© UCLES 2022
Page 10 of 10
October 2022