Round a decimal number with hundredths to the nearest whole number
Lesson details
Learning outcome
I can round a decimal number with hundredths to the nearest whole number
Key learning points
- Identify the next and previous whole numbers to the number being rounded.
- Identify which whole number is nearest to the number being rounded.
- If the value of the tenths is 5 or greater then round up to the next whole number.
- If the value of the tenths is less than 5, ignore the tenths and round down to the whole number.
- To round a number with hundredths to the nearest whole number, you only need to look at the tenths.
Keywords
Multiple - A multiple is the result of multiplying a number by an integer. For example 2 × 5 = 10 so 10 is a multiple of 2 and 5.
Previous - Something that comes before something else is known as the previous thing.
Next - Something that comes after something else is known as the next thing.
Rounding - Rounding means making a number simpler but keeping its value close to what it was.
Common misconception
Pupils may mistake the previous multiple of one for example: previous multiple of 6.38 being 5.
Ensure pupils are given plenty of opportunities to place numbers on number lines, identifying the previous and next multiples of one.
Teacher tip
Ensure you build towards pupils generalising for themselves and that they look at the column to the right of the place value they want to round towards. Rounding the same number to different place values can help with this.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Which numbers are multiples of 1?
Q2.What is the missing number in the sequence?
Q3.Match the number to the correct letter on the number line.
A
B
C
D
Q4.What are the closest multiples of one that 6.38 sits between?
Q5.What is 9.97 rounded to the nearest multiple of 0.1?
Q6.What is 9.9 rounded to the nearest multiple of 1?
Assessment exit quiz
6 Questions
Q1.What are the closest multiples of one that 3.29 sits between?
Q2.Tick the statements that are correct about the number 4.56
Q3.What is 6.50 rounded to the nearest multiple of 1?
Q4.Tick the numbers that would round to the previous multiple of one, in this case 8.
Q5.A bag of sweets weighs 45.41 g. How much does the bag weigh to the nearest gram? g
Q6.Sam eats 5 sweets from a bag. The bag now weighs 32.51 g. How much does the bag weigh to the nearest gram? g
To help you plan your 5 maths lesson on: Round a decimal number with hundredths to the nearest whole number, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 5 maths lesson on: Round a decimal number with hundredths to the nearest whole number, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 2 maths lessons from the Use knowledge of decimals to solve problems in different contexts: length unit, dive into the full primary maths curriculum, or learn more about lesson planning.