Ks3 Mathematics Level 4 Answers - Mental Arithmetic Questions Page 12
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20Which calculation?
(b)
Use the information about the school to write what the missing
question could be.
Here is some information about a school.
Question
Calculation
There are
3 classes
in
year 8
. Each class has
27 pupils.
There are
4 classes
in
year 9
. Each class has
25 pupils.
(a)
Use the information to match each question with the correct
How many
calculation. The first one is done for you.
4 × 25
students are
there in Year 9?
Question
Calculation
3 + 4
1 mark
How many
classes
are there
Chains
3 – 4
altogether in
years 8 and 9?
(a)
The number chain below is part of a doubling number chain.
Fill in the two missing numbers.
4 – 3
There are more
classes
in year 9 than in year 8.
20
320
40
80
160
(3 × 27) + (4 × 25)
How many more?
.................
.................
1 mark
(3 + 27) + (4 + 25)
(b)
The number chain below is part of a halving number chain.
How many
pupils
are there
altogether in
years 8 and 9?
Fill in the two missing numbers.
(3 × 27) – (4 × 25)
5
2.5
40
20
10
.................
.................
There are more
pupils
(4 + 25) – (3 + 27)
in year 9 than in year 8.
1 mark
How many more?
(4 × 25) – (3 × 27)
3 marks
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