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Algebra pyramids
In each pyramid each block is the sum of the two blocks below. Fill in the missing expressions. 1.
2.
12
4
8
2
3.
5
-6
-1
a+b
2a
3b + 2c 5r + t
12t
3s + t
4.
2g
3f + g
3f
5.
6.
2x
4x + 6y
2x – y
7.
3m
2m + 7d
8m – 2d
m
2a + 2c
3b + c
3c
8.
a–c
© www.teachitmaths.co.uk 2011
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Page 1 of 2
Algebra pyramids
Answers 1.
2.
22
-8
12
10
4
-1
8
2
5
3.
-6
4.
2g
6f + g
3f
a+b
5.
6.
6x + 5y
4x + 6y
2a
5r + 13t
2x – y
3b + 2c 5r + 3s +
26t
12x + 11y
2x
2a + 3b +
2c
3a + b
3f + g
6x + 6y
-1
5a + 4b +
2c
9f + 4g
3f + 3g
-7
5r + t
3s + 13t
12t
3s + t
7.
34m + 15d
15m + 12d
5m + 7d
3m
19m + 3d
10m + 5d
2m + 7d
8.
3a + c
© www.teachitmaths.co.uk 2011
8m – 2d
m
7a + 9b +
11c
5a + 3b +
4c
a–c
9m – 2d
2a + 6b +
7c
2a + 3b +
3c
2a + 2c
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3b + 4c
3b + c
3c
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