Understanding precision and measuring

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Presentation transcript:

Understanding precision and measuring The Metric Ruler Understanding precision and measuring

Using a Metric Ruler WITH a VISIBLE 0 MARK Example 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 cm Length = 10.60 cm

To obtain the most ACCURATE RESULTS, never forget the most important rule: Always read your measurement one place more than the precision of the ruler. This ruler has a precision of .1 cm so measure to the .10 cm at least.

Using a Metric Ruler WITH a VISIBLE 0 MARK Example 2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 cm Length = 8.00 cm

Using a Metric Ruler WITHOUT a VISIBLE 0 MARK Example 1 cm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Length of bar 12.20 cm – 1.00 cm = 11.20 cm

Using a Metric Ruler WITHOUT a VISIBLE 0 MARK Example 2 Length of Bar 11.0 – 1.0 = 10.0 cm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Estimating Digits While Measuring Objects Example 1 2 3 4 5 cm 6 3.20 3.30 Length of Bar = 3.23 cm

Estimating Digits While Measuring Objects Example 2 8.0 cm 9.0 cm Length of Bar = 8.8 cm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 cm