The Metric The Metric RulerRuler

Understanding precision and measuring

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

cm

0

Length = 10.60 cm

Using a Metric Ruler WITH a VISIBLE 0 MARK

Example 1

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

0

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

1 2 3 4 5

cm

60

3.20 3.30Length of Bar = 3.23 cm

Estimating Digits While Measuring Objects

Example 2

8.0 cm 9.0 cmLength of Bar = 8.8 cm

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

cm

0