Multiplying an expression by a term | Maths | Quizalize & Oak National Academy

Starter quiz

In the expression $x-7$ the $-7$ is a constant. What do we call the $x$ ?
- An exponent.
- A variable term. ✓
- An equation.
Match the expressions to their simplified form.
- $x+x$
  
  ⇔
  
  $2x$ ✓
- $x \times x$
  
  ⇔
  
  $x^2$ ✓
- $x \times y$
  
  ⇔
  
  $xy$ ✓
- $y \times y$
  
  ⇔
  
  $y^2$ ✓
- $y+y$
  
  ⇔
  
  $2y$ ✓
This area model helps us with which multiplication?
- $9x \times 7$
- $7 \times 9x$
- $9(x+7)$ ✓
- $7(x+9)$
- $9 \times 7x$
This area model is used to expand $9(x+7)$ . What is hidden by the ink blots?
- $9x$ and $7$
- $63x$
- $9x$ and $63$ ✓
- $9x$ and $16$
- $7x$ and $63$
Using distributive law $6(2x+3 +y)$ can also be written as which of the below?
- $12x+18 +6y$ ✓
- $62x+3+y$
- $36xy$
- $30xy$
- $6+2x+3+y$
Match together the expressions which are always equal to each other.
- $2(x+5)$
  
  ⇔
  
  $2x+10$ ✓
- $2(x-5)$
  
  ⇔
  
  $2x-10$ ✓
- $-2(x-5)$
  
  ⇔
  
  $10-2x$ ✓
- $-2(x+5)$
  
  ⇔
  
  $-2x-10$ ✓

In the expression $5b^4 + 7$ , the 4 is __________.
- an equation
- a term
- an exponent ✓
- a multiplier
- a constant
Expand $x(x+1)$
- $2x+1$
- $2x+2$
- $2x+x$
- $x^2+x$ ✓
- $x^2+1$
Algebra tiles shown are being used to model which of these?
- $x(x+1)$
- $x(x+4)$ ✓
- $2(x+4)$
- $x(x^2+4x)$
What is hidden by the ink blots in this area model?
- $2a$ and $9a^2$
- $2a^2$ and $9a$
- $a^3$ and $9a$
- $9a^3$ and $9a^2$
- $a^3$ and $9a^2$ ✓
Expand $2e^2(3e +7f -5)$
- $6e^3 +14e^2f -10e^2$ ✓
- $2e^3 +14e^2f -10e^2$
- $6e^3 +14ef -10e^2$
- $6e^3 +14e^2f -10e$
Expand $-5y^2(3x-4y^3)$
- $20y^5-15xy^2$ ✓
- $15xy^2-20y^5$
- $20y^5-15x^2y$
- $-15xy^2-20y^5$

Loading video...

How to deal with exponents. y^2 times by y makes 3y. Or at least has a coefficient that is not 1.

Unsimplifying first. Not sure? Break it down. What is it? a^2 is a x a. So a^2 x a must be a x a x a.