Expressions, formulae and equations

Using expressions and formulae

Name: ______________________________Date: ______________Score: ______ / 20

1.
Work out 4x + 3 when x = 10.
2.
The perimeter of a rectangle is P = 2(l + w). Work out P when l = 11 and w = 5.
3.
Work out 6(x + 9) when x = 8.
4.
Work out 9x + 5 when x = 3. Which is correct?
1. A32
2. B72
3. C17
5.
When x = 9, the value of 2x is 11.
True False
6.
Work out 2n + 7 when n = 6.
7.
The perimeter of a rectangle is P = 2(l + w). Work out P when l = 8 and w = 8.
8.
Work out 10/2 when the top number is 10.
9.
A recipe uses 75 grams of rice per person. How many grams are needed for 6 people?
g
10.
The perimeter of a square is P = 4s. Work out P when s = 9.
11.
Work out 2y − 8 when y = 10.
12.
The area of a rectangle is A = lw. Work out A when l = 3 and w = 6.
13.
Work out 7x + 5x when x = 4.
14.
When x = 5, the value of 6x is 11.
True False
15.
Work out 9x + 3 when x = 11.
16.
The perimeter of a rectangle is P = 2(l + w). Work out P when l = 5 and w = 6.
17.
Work out 3(x + 6) when x = 5.
18.
Work out 6x + 5 when x = 8. Which is correct?
1. A53
2. B78
3. C19
19.
When x = 7, the value of 5x is 12.
True False
20.
Work out 7n + 8 when n = 9.

Answer key

Expressions, formulae and equations — Using expressions and formulae