Worksheets · Foundation and Higher

Substitution and calculator brackets

3 exam-style questions. Answers and the mark for each step are on the last page.

1. Question 1Non-calculator · 4 marks

   $a = 4$ and $b = -3$.

   (a) Work out the value of $a + b$. (1)

   (b) Work out the value of $3a - 2b$. (2)

   (c) Work out the value of $b^2$. (1)
2. Question 2Non-calculator · 5 marks

   $a=-2$ and $b=5$.

   (a) Work out $a^2-2ab$. (3)

   (b) Work out $(a+b)^2$. (2)
3. Question 3Non-calculator · 5 marks

   $s = ut + \frac{1}{2}at^2$

   (a) Work out the value of $s$ when $u = 5$, $a = -4$ and $t = 3$. (2)

   (b) When $t = 4$ and $a = 3$, the value of $s$ is $40$. Find the value of $u$. (3)