Calculations with variables
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Lesson details
Key learning points
- In this lesson, we will look at writing calculations that include algebraic terms.
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5 Questions
Q1.
Answer the following: 18 x (5 - 3) + 7
45
94
Q2.
Answer the following: 15 - 5 x 2
10
20
Q3.
Answer the following: (18 - 7) x (2 + 5)
-33
27
Q4.
Which of the following statements matches the calculation 15 x (5 - 3)?
Add 3 to 5 then multiply by 15
Multiply 15 by 5 then subtract 3
Q5.
Which of the following statements matches the calculation 15 x (5 - 3) + 3?
Add 3 to 5, then multiply by 15 and then add 3
Multiply 15 by 5, then subtract 3 and then add 3
5 Questions
Q1.
Which calculation matches the statement: I think of a number. I multiply my number by 2 then I subtract 5. (In the below calculations, m represents the originally thought number.)
m - 5 x 2
m x (2 - 5)
Q2.
Which calculation matches the statement: I think of a number. I subtract 5 from my number then I multiply by 2. (In the below calculations, m represents the originally thought number.)
m - 5 x 2
m x (2 - 5)
Q3.
Which calculation matches the statement: I think of a number. I subtract 5 from my number then I multiply by 2. I then subtract subtract 6 and finally multiply by 3.
(m - 5 x 2 - 6) x 3
m - 5 x 2 - 6 x 3
Q4.
Which of the following values of m gives an answer between 50-60 for the following calculation? 5 x m - 3
10
13
9
Q5.
Which of the following values of m gives an answer between 30-35 for the following calculation? 5 x (m - 3)
12
13
8