Writing and evaluating expressions
Answers are for parents and teachers.
1
Write “the product of 7 and y, plus 2” as an expression.
7y + 2.
2
Write “10 less than 4 times a number”.
4n − 10.
3
Work out 30 − 2 × 3².
3² = 9, 2 × 9 = 18, 30 − 18 = 12.
4
Work out (9 − 4)² + 1.
5² + 1 = 25 + 1 = 26.
5
Find 6x − 4 when x = 5 and when x = 10.
x = 5: 30 − 4 = 26. x = 10: 60 − 4 = 56.