Rounding Numbers

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Rounding Numbers

We can round numbers to estimate how big they are. This is very similar to using near numbers.

Rounding to the nearest 10

When we round to the nearest 10, we need to look at the ones:
If the number is 5 or more, you round it up to 10.
- E.g. 4,158 rounds up to 4,160.
If the number is less than 5, you round it down to 0.

Rounding to the nearest 100

When we round to the nearest 100, we need to look at the tens:
If the number is 5 or more, you round it up to 100.
- E.g. 6,452 rounds up to 6,500 to the nearest 100.
If the number is less than 5, you round it down to 0.

Rounding to the nearest 1,000

When we round to the nearest 1,000, we need to look at the hundreds:
If the number is 5 or more, you round it up to 1,000.
If the number is less than 5, you round it down to 0.
- E.g. 3,213 rounds down to 3,000 to the nearest 3,000.

1Year 3 - Number

2Year 3 - Measurement

2.1Length

2.1.1Length

2.1.2Comparing Lengths

2.1.3Add & Subtract Lengths

2.1.4Perimeter

2.2Mass

2.2.1Mass

2.2.2Comparing Masses

2.2.3Add & Subtract Masses

2.3Volume & Capacity

2.3.1Volume & Capacity

2.3.2Comparing Volumes

2.3.3Add & Subtract Volumes

2.4Money

2.4.1Money

2.4.2Counting Money

2.4.3Adding & Subtracting Money

2.5Time

2.5.1Units of Time

2.5.2Clocks

2.5.3Telling the Time

2.5.4Time of the Day

2.5.512-Hour & 24-Hour Clocks

2.5.6Measuring Time

3Year 3 - Geometry

3.1Angles

3.1.1Angles in Degrees

3.1.2Types of Angle

3.2Properties of Shapes

3.2.12D Shapes

3.2.23D Shapes

3.3Straight Lines

3.3.1Straight Lines

3.3.2Parallel & Perpendicular Lines

4Year 3 - Statistics

4.1Statistics

4.1.1Statistics

4.1.2Pictograms & Bar Charts

5Year 4 - Number

6Year 4 - Measurement

6.1Units

6.1.1Metric Measurements

6.1.2Adding & Subtracting Money

6.2Time

6.2.1Converting Units of Time

6.2.2Changing the 12-Hour Clock to the 24-Hour Clock

6.2.3Changing the 24-hour Clock to the 12-Hour Clock

7Year 4 - Geometry

7.1Properties of Shapes

7.1.1Symmetry

7.1.2Types of Triangle

7.1.3Quadrilaterals

7.2Perimeter & Area

7.2.1Perimeter

7.2.2Area

7.3Position & Direction

7.3.1Coordinates

7.3.2Translation

8Year 4 - Statistics

8.1Statistics

8.1.1Types of Data

8.1.2Pictograms & Bar Charts

8.1.3Line Graphs

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