Round a 4-digit number to the nearest hundred and ten
I can use place value to round a 4-digit number to the nearest hundred and the nearest ten.
Round a 4-digit number to the nearest hundred and ten
I can use place value to round a 4-digit number to the nearest hundred and the nearest ten.
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Lesson details
Key learning points
- Identify the next and previous multiples of 10 or 100 to the number on a number line.
- Rounding to the nearest 100, look at the tens value to decide whether to round to the previous or next multiple of 100
- Rounding to the nearest 10, look at the ones value to decide whether to round to the previous or next multiple of 10
- If the value of the digit you are looking at is 5 or more you round to the next multiple.
Keywords
Rounding - Making a number simpler but keeping its value close to what it was.
Multiple - The result of multiplying a number by an integer. For example, multiples of 100 are 100, 200, 300, 400 etc.
Common misconception
A tricky digit for many pupils to consider is 0 because the rounded number is often the same as the original number. Pupils are often tempted to round to the multiple before the one they should.
Spend some time establishing with pupils that occasionally when zeroes are involved, the number does not actually change when it is rounded. Number lines are a great visual support when rounding, including in this aspect.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.What is the next number in the sequence? 0 100 200 300
Q2.Which of these numbers is a multiple of 100?
Q3.Which of these is the multiple of 10 that comes before 327?
Q4.What is the next multiple of 10 after 589?
Q5.Match each 3-digit number to the nearest multiple of 10
150
160
140
Q6.When rounding numbers, what is the rule for the digit 5?
Assessment exit quiz
6 Questions
Q1.Round 4,825 to the nearest multiple of 100
Q2.Select all of the numbers that, when rounded to the nearest multiple of 100, round to 5,200
Q3.Round 3,515 to the nearest multiple of 10
