Measuring Length with Rulers

Materials Required for Measurement

• Units of Measurement:

  • The quarter inch (in.), half inch (in.), and inch (in.) are customary units used to measure length.

• Markings on the Ruler:

  • Some measures on the ruler are not exact.

  • These measures are indicated as rounded to the nearest unit.

• Measurement Rule:

  • Align the object with the beginning of the ruler for accurate measurement.

Breakdown of Measurements

• Quarter Inch (1/4 in.):

  • There are 4 quarter inches in every inch.

• Half Inch (1/2 in.):

  • There are 2 half inches in every inch.

• Inch (1 in.):

  • The longest marks indicate whole inches: 1, 2, 3, etc.

• Align the end of one of the objects with the beginning of the ruler.