Statements which correctly state the expression in words and where the role of the brackets is explicit.
Examples:

•

•

i)
ii)
i)
ii)
iii)

Add 3 to t.
Multiply the result of i) by 4.
Multiply t by 4.
Multiply 3 and 4.
Add the results of i) and ii).

moderate

2 marks
(for all correct) or
1 mark
(for 1 error or the last step missing)

b)

Statements which correctly state the expression in words and where the role of the brackets is explicit.
Examples:

•

•

i)
ii)
iii)
i)
ii)
iii)

Multiply p by 2p.
Multiply 2p by 1 or 2p by ⁻1
Subtract ii) from i) or add i) and ii)
Subtract 1 from p.
Multiply p by 2.
Multiply the results of i) by ii).

2 marks - difficult

1 mark - moderate

2 marks
(for all correct) or
1 mark
(for 1 error or the last step missing)

c)

Statements which correctly state the expression in words and where the role of the brackets is explicit.
Examples:

•

•

i)
ii)
iii)
iv)
v)
i)
ii)
iii)
iv)
v)

Multiply n by 3.
Add on 1 to the result of i).
Multiply n by 2.
Subtract 2 from the result of iii).
Multiply the result of ii) by the result of iv).
Multiply 3n by 2n.
Multiply 3n by ⁻2.
Multiply 2n by 1.
Multiply 1 by ⁻2.
Add i), ii) iii) and iv).

2 marks - very difficult

1 mark - difficult

NOTES:

The role of the brackets must be explicit. For example, "4 times t plus 3" is incorrect.

Multiplying by ⁻1 and adding is equivalent to multiplying by 1 and subtracting.

Accept statements which use expressions like "3t" instead of specifying "3 times t" in full.