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 $-5y^2(3x-4y^3)$

$20y^5-15xy^2$ ✓

$15xy^2-20y^5$

$20y^5-15x^2y$

$-15xy^2-20y^5$

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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.