Ks3 Mathematics Level 4 Answers - Mental Arithmetic Questions Page 14
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20Place value
Shapes on a grid
(a)
Add together 1740 and 282
Here is a sequence of shapes made with grey and white tiles.
Shape
Shape
Shape
Shape
number 1
number 2
number 3
number 4
2022
1 mark
(b)
Now add together 17.4 and 2.82
You can use part (a) to help you.
20.22
1 mark
The number of grey tiles
=
2
×
the shape number
(c)
3.5 + 2.35 is bigger than 3.3 + 2.1
The number of white tiles
=
2
×
the shape number
How much bigger?
(a)
Altogether, how many tiles will be in shape number 5?
3.5 + 2.35 = 5.85
4 X 5 = 20
20
3.3 + 2.1 = 5.4
........................ tiles
5.85 – 5.4 = 0.45
1 mark
(b)
Altogether, how many tiles will be in shape number 15?
0.45
4 X 15 = 60
2 marks
60
........................ tiles
1 mark
(c)
Write the missing number below.
4
The total number of tiles = ..................... × the shape number
1 mark
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