Substituting particular values | Maths | Quizalize & Oak National Academy

Starter quiz

Calculate $(-5)^2$
- '25' ✓
Select the correct first step to evaluate $2+3\times 5^2$
- $2+3=5$
- $3\times 5= 15$
- $5^2=25$ ✓
Evaluate ${12\times 2\over 4}-2$
- '4' ✓
Starting with the first step, put these lines of working in order to show how to evaluate ${25+2\times (2+1)^2\over 10}-4$
- 1
  
  ⇔
  
  ${25+2\times 3^2\over 10}-4$
- 2
  
  ⇔
  
  ${25+2\times 9\over 10}-4$
- 3
  
  ⇔
  
  ${25+18\over 10}-4$
- 4
  
  ⇔
  
  ${43\over 10}-4$
- 5
  
  ⇔
  
  $4.3-4$
In the equation $2a+1=5-3a$ , $5-3a$ is called an ______
- 'expression' ✓
Mach up the directed number calculation with the correct value
- $(-10)^2$
  
  ⇔
  
  100 ✓
- $-10\times 2$
  
  ⇔
  
  -20 ✓
- $-10\times -2$
  
  ⇔
  
  20 ✓
- $2-10$
  
  ⇔
  
  -8 ✓
- $2--10$
  
  ⇔
  
  12 ✓
- $-2--10$
  
  ⇔
  
  8 ✓