Year 8
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Lesson details
Key learning points
- In this lesson, we will learn about approximation and how to use that to approximate answers to calculations.
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.
What is 234.8 to the nearest integer?
230
234
240
Q2.
Round 152.8 to the nearest 10
152.0
153
160
Q3.
Round 9.064 to 2 decimal places
9.05
9.10
9.60
Q4.
Round 18.961 to 1 decimal place
18
18.0
18.9
Q5.
Round 7846.7 to the nearest 100
7847
7850
7900
6 Questions
Q1.
What does this symbol mean? ≈
Closely linked to
Equal to
Not equal to
Q2.
Find an approximation for:
18
27
27.3
Q3.
A student is thinking of an approximate value for √(67 ). What should her answer be?
2√(17) because that is the answer my calculator gives
8.24 because that is the exact answer to 2 d.p.
9 because 67 is closer to 70
Q4.
Find an approximation for:
10.5
15
22.5
Q5.
Find an approximation for:
25
44
55.7
Q6.
Why is the approximation to this calculation greater than the actual answer?
Carlos approximate answer is wrong.
Carlos rounded down when he was approximating