Exploring expressions with two variables
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Lesson details
Key learning points
- In this lesson, we will explore expressions with two variables and how to interpret them. We will also look at examples involving spending money on combinations of pens and pencils.
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5 Questions
Q1.
Look at the picture below and then fill in the gap: If the same expression is __________ to two equal quantities, then the two resulting expressions will be equal.
divided
multiplied
subtracted
Q2.
Look at the picture below and then fill in the gap: If the same expression is ___________ from two equal quantities, then the two resulting expressions will be equal.
added
divided
multiplied
Q3.
Look at the picture below and then fill in the gap: If two equal expressions are both _____________ by the same quantity, then the two resulting expressions will be equal.
added
divided
subtracted
Q4.
Look at the picture below and then fill in the gap: If two equal expressions are both __________ by the same quantity, then the two resulting expressions will be equal.
added
multiplied
subtracted
Q5.
If 𝑥 + 𝑦 = 100, then what is the value of 2𝑥 + 2𝑦 - 20?
160
200
220
5 Questions
Q1.
If a protractor costs 50p and a ruler costs 60p, what is the cost of 3 protractors and 2 rulers?
£1.10
£1.50
5
Q2.
Given that p=3 and r=5, evaluate 3p+2r.
21
5
9p+10r
Q3.
I want to buy 3 rulers and 3 protractors. If they cost 40 pence each, how much will I spend?
£1.20
£24
40 pence
Q4.
Given that y=13, which of the following expressions is equal to 195?
13y
182y
195y
Q5.
If x=4 and y=5, which of the following expressions is equal to 24?
4x+y
x+3y
x+y