Year 6

Expressing missing number problems algebraically

Year 6

Expressing missing number problems algebraically

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Lesson details

Key learning points

  1. In this lesson, we will be exploring various problems and representing them using algebra.

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.
t + 7 = 20 What is the value of t?
t = 10
t = 12
Correct answer: t = 13
t = 27
Q2.
If 5a = 35 What is the value of a?
30
40
6
Correct answer: 7
Q3.
How could we express the perimeter of the rectangle below?
An image in a quiz
Correct answer: 2(a + b)
4a
a + b
ab
Q4.
How could we express the perimeter of the square below?
An image in a quiz
2r
Correct answer: 4r
r + 4
r + s
Q5.
If 2f + 6= 20. What is the value of f?
6
Correct answer: 7
8
9

4 Questions

Q1.
Which expression would represent the following problem: The cooking time for roast beef is 30 minutes for every kg plus an additional 15 minutes.
Correct answer: a = 30b + 15
a = 500b + 30
Q2.
Which expression would represent the following problem: The cost of a photo album book is £2.50 for binding and printing with an additional cost of 15p per photograph.
Correct answer: a = 15b +250
a = 250b + 15
Q3.
Which expression would represent the following problem: A singer makes money from selling music. They pay a one-off fee of £25.00 to Oak-Tunes for marketing and distribution costs and receive 55p for each copy of the album sold.
a = 25 + 0.55
a = 2500 + 55a
Correct answer: a = 55b - 2500
Q4.
Instead of writing 5 x a in an algebraic expression, what could I write instead?
5 + a
Correct answer: 5a
a5