New
New
Year 8

Checking understanding of rounding

I can round to the nearest 100 or 10 or whole number or to 1 or 2 decimal places.

New
New
Year 8

Checking understanding of rounding

I can round to the nearest 100 or 10 or whole number or to 1 or 2 decimal places.

Lesson details

Key learning points

  1. Any number can be rounded to the nearest 10, 100 or 1000.
  2. A number with one or more decimal places can be rounded to the nearest whole number.
  3. A number with two or more decimal places can be rounded to one decimal place.
  4. A number with three or more decimal places can be rounded to two decimal places.

Common misconception

When rounding a number, pupils write the first significant digit(s) only. E.g 36 789 is 4.

The use of the place value table shows the magnitude of the number, thus preserving their place value.

Keywords

  • Round - To change a number into another number that is approximately the same value but is easier to work with. E.g. round 561 to the nearest 10 is 560.

When beginning discussions about rounding ask the class if they can think of situations, headlines. etc that they believe have used/or would use rounded figures instead of the exact figures. Or, times they have used rounded figures in their everyday lives.
Teacher tip

Equipment

Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

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6 Questions

Q1.
Jun writes 378 as approximately 400. Jun has written it to the hundred.
Correct Answer: nearest, closest
Q2.
Which digit is in the thousands column in 43 978?
Correct Answer: 3, three
Q3.
Which digit is in the tens column in 3492?
Correct Answer: 9, nine
Q4.
In the number 57.392, which column is the 3 in?
tens
ones
Correct answer: tenths
hundredths
thousandths
Q5.
In the number 57.392, which column is the 2 in?
Correct answer: thousandths
hundredths
tenths
ones
tens
Q6.
The number that is halfway between 3 and 4 is
Correct Answer: 3.5, 3.50, 3 and a half, 3 1/2

6 Questions

Q1.
Rounding means to change a number into another number that is the same value but is easier to work with.
Correct Answer: approximately, nearly, almost, roughly
Q2.
13 745 rounded to the nearest thousand is .
Correct Answer: 14 000, fourteen thousand
Q3.
Lucas buys a t-shirt costing £14.75. What is the cost of the t-shirt to the nearest pound?
Correct Answer: £15.00, £15, 15
Q4.
Round 178.358 to 1 decimal place.
Correct Answer: 178.4
Q5.
Round 17.3095 to 2 decimal places.
Correct Answer: 17.31
Q6.
Round 109.3978 to 2 decimal places.
Correct Answer: 109.40