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.
Licence
This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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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