Algebraic notation | Maths | Quizalize & Oak National Academy

Starter quiz

Which of the following is the same as $9+9+9+9$ ?
- $4^9$
- $9^4$
- $4\times9$ ✓
- $4+9$
Select any calculations which are the same as $3\times4\times5$
- $(3\times5)\times4$ ✓
- $7\times 5$
- $(3\times4)+(3\times5)$
- $(5\times4)\times3$ ✓
- $3+20$
Which of these is the same as writing $7\times7\times7$ ?
- $7+7+7$
- $3\times7$
- $7^3$ ✓
- $3^7$
In algebra, letters are used to represent unknowns or ______
- 'variables' ✓
Select the statement that can be represented by the equation $a+6-2+a=18$
- I think of a number, add 6 then subtract 2 and the answer is 18
- I think of a number, add 2 and subtract 6 to get 18
- I think of a number, subtract 2 and add 6 then add my original number to get 18 ✓
- I think of a number, square it, add 6 then subtract 2 to get 18
- I add 6 to my number, add 2 to my number and the difference is 18
Match the directed number calculations with the correct answers.
- $12+-5$
  
  ⇔
  
  7 ✓
- $-12+-5$
  
  ⇔
  
  -17 ✓
- $-12+5$
  
  ⇔
  
  -7 ✓
- $12--5$
  
  ⇔
  
  17 ✓