 Counting and understanding number
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Can I round whole numbers to 1000 to the nearest 10 or 100?

### Example review questions

• Can you:
• suggest a number that rounds to 60 when rounded to the nearest 10?
• explain how you round 676 to the nearest 10?
• explain how you round 249 to the nearest 100?
• round 251, 243 and 245 to the nearest 10?
• round the same three numbers to the nearest hundred?
• Which multiples of 10 lie between 300 and 400? Which of these is 316 closest to?
• Say the multiples of 100 between 0 and 1000. Which of these is 753 closest to? How do you know?
• A number rounded to the nearest ten is 540. What is the smallest possible number it could be?

### Teaching guidance

This teaching guidance document suggests some of the key vocabulary, models, images and practical equipment that children should experience and be able to use. It also includes some teaching tips to provide a few starting points for ways of supporting children with this area of mathematics. Can I round whole numbers to 1000 to the nearest 10 or 100? - teaching guidance | 201KB ### Consolidation and practice

These resources are to support children in guided or independent work. Roll over the highlighted resources for a description.

#### Decimal number line This interactive teaching program (ITP) is an ICT-based tool to support the exploration of place value within whole and decimal numbers. Decimal number line ITP allows the child or teacher to select an interval from a given number line and show that interval divided into ten equal parts but on a bigger scale, which can then be repeated.

#### Measuring scales This interactive teaching program (ITP) is an ICT-based tool to support the exploration of number, measures and problem solving. Measuring scales ITP allows the child or teacher to add different masses of 1, 2, 5, 10, 50, 100 and 500 units to a scale pan. The scale intervals can be changed to challenge children to interpret different scales.

#### Measuring cylinder This interactive teaching program (ITP) is an ICT-based tool to support the exploration of number, measures and problem solving. Measuring cylinder ITP allows the child or teacher to simulate varying intervals on a scale, pouring liquid into the cylinder and interpreting the scale. The ITP can be used to explore and consolidate the interpretation and reading of scales, mental calculation strategies and methods of recording.

#### Number line This interactive teaching program (ITP) is an ICT-based tool to support the exploration of number. Number line ITP allows the child or teacher to display a range of numbers from minus 50 up to 500. Children can estimate a number on the number line, explore the concept of difference between two given numbers and demonstrate their calculation strategies.

### Opportunities to use and apply

Possible contexts include:

• approximation in calculation, e.g. 378 − 83, what is the approximate answer?
• addition and subtraction involving rounding and adjusting, e.g. Children find 52 + 29 by calculating 52 + 30 then subtracting 1.
• money and measures, e.g. What is 275p rounded to the nearest pound? What is 845 cm rounded to the nearest metre?
• reading scales to the nearest numbered interval, e.g. What is the weight shown on these scales (to the nearest
100 g)? 