# 2.2 Constructing expressions

WALT
9Ae.03 Represent a situation either in words or as an algebraic expression, and move between the two representations (including squares, cubes and roots).
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Slide 1: Slide
MathematicsSecondary Education

This lesson contains 17 slides, with interactive quizzes and text slides.

Lesson duration is: 50 min

## Items in this lesson

WALT
9Ae.03 Represent a situation either in words or as an algebraic expression, and move between the two representations (including squares, cubes and roots).

#### Slide 3 -Open question

Kara thinks of a number, n.  Match the correct expression for the number Kara gets when she:
multiplies the number by five, then subtracts five
divides the number by five, then adds five
adds five to the number, then multiplies by five
subtracts five from the number, then divides by five
subtracts the number from five

#### Slide 4 -Drag question

multiplies the number by 7
Write an expression, in terms of x,

#### Slide 5 -Open question

subtracts the number from 20
Write an expression, in terms of x,

#### Slide 6 -Open question

multiplies the number by 2, then adds 9
Write an expression, in terms of x,

#### Slide 7 -Open question

divides the number by 6, then subtracts 4
Write an expression, in terms of x,

#### Slide 8 -Open question

multiplies the number by itself
Write an expression, in terms of x,

#### Slide 9 -Open question

divides 100 by the number
Write an expression, in terms of x,

#### Slide 10 -Open question

subtracts 7 from the number, then multiplies the result by 5
Write an expression, in terms of x,

#### Slide 11 -Open question

square roots the number
Write an expression, in terms of x,

#### Slide 12 -Open question

cubes the number
Write an expression, in terms of x,

#### Slide 13 -Open question

cube roots the number
Write an expression, in terms of x,

#### Slide 14 -Open question

multiplies the number by 3, squares the result, then adds 7
Write an expression, in terms of x,

#### Slide 15 -Open question

multiplies the number by 2, cubes the result, then subtracts 100
Write an expression, in terms of x,

#### Slide 16 -Open question

Write down an algebraic expression.
I think of a number m,
I divide by 8,
then I cube,
then I subtract 7.
I think of a number x,
I subtract 8 from the number,
then I square,