As part of our new interactive site we're keeping the ability to download and print worksheets. We're a big believer in using new technology to enrich education, however there's a time when nothing will beat good old pen and paper. That's why we are making all our worksheets available to download via a PDF. Here's an example of the design.

1. Maths Worksheet
Check the order of magnitude by rounding
Ref: MY7W2356
Maths Worksheet
Check the order of magnitude by
rounding
This worksheet uses a simple practice to test a child’s understanding
of rounding. The worksheet also uses mental arithmetic and calculator
skills to derive answers.
Key Information
Topic Rounding
Level (1-3)
Questions 10
Key Stage 3
Year 7
Curriculum Coverage Number and the number system
Curriculum Skill Written and calculator methods
Name
Date
© EdPlace Limited 2011 Page 1 of 3

2. QUESTIONS Maths Worksheet
Check the order of magnitude by rounding
Ref: MY7W2356
Here’s an example of checking the order of magnitude by rounding.
7840 × 28 is approximately 8000 × 30 or 240000
24216 - 18947 is approximately 24000 - 19000 or 5000
542 ÷ 18 is approximately 500 ÷ 20 or 25
3.42 × 19 lies between 3 × 19 and 4 × 19 or between 57 and 76.
Work out approximate answers to the following problems in the same way. Write down
the approximations you use. Check to see how close you are by doing the calculation
on your calculator.
Question 1
8.64 x 28 lies between
[Answer 1] and [Answer 2]
or [Answer 3] and [Answer 4]
Using a calculator, 8.64 x 28 = [Answer 5]
Your answers
Answer 1 Answer 3 Answer 5
Answer 2 Answer 4
Question 2
4.34 x 22 lies between
[Answer 1] and [Answer 2]
or [Answer 3] and [Answer 4]
Using a calculator, 4.34 x 22 = [Answer 5]
Your answers
Answer 1 Answer 3 Answer 5
Answer 2 Answer 4
© EdPlace Limited 2011 Page 2 of 3

3. ANSWERS Maths Worksheet
Check the order of magnitude by rounding
Ref: MY7W2356
Answer 1
Correct answers
Answer 1 8 x 28 Answer 3 224 Answer 5 241.92
Answer 2 9 x 28 Answer 4 252
Answer Explanation
Start by rounding down. Then round up. Use your calculator to multiply the 2 numbers.
This correct answer should lie between the numbers you round down and up.
Answer 2
Correct answers
Answer 1 4 x 22 Answer 3 88 Answer 5 95.48
Answer 2 5 x 22 Answer 4 110
Answer Explanation
Start by rounding down. Then round up. Use your calculator to multiply the 2 numbers.
This correct answer should lie between the numbers you round down and up.
Total score: /10
© EdPlace Limited 2011 Page 3 of 3