Measuring with a Customary Ruler

How many inches are in one foot?

• 6

• 16

• 15

• 12

Estimate the length of a key.

• 4 ft.

• 4 in.

• 1 cm.

• 18 cm

• 1 cm

• 16 cm

• 6 cm

Where do we start to line up the ruler?

• 0 cm

• 1 cm

• 3 cm

• at any cm

Measure the length of the pencil in cm.

• 13 cm

• 20 cm

• 12 cm

• 14 cm

What is this tool used to measure?

• Length

• Shape

• Weight

• Color

A customary unit for measuring length.

• length

• inch

• estimate

Estimate the size of a bottle cap.

Remember: 1 foot is the size of an inch ruler.

• 1 inch

• 1 foot

• 1 yard

Estimate the size of a pencil.

Remember: 1 foot is the size of an inch ruler.

• 10 inches

• 10 yards

• 10 feet

Why do we use Cenimeters and Inches?

• t is also used in Japan for electronic parts, especially display screens. For the United Kingdom, guidance on public sector use states that, since 1 October 1995,

• The length of what is used to measure

•  a unit of length in the imperial and United States customary systems of measurement.

• the international inch has been exactly 25.4 mm. There are 12 inches in a foot and 36 inches in a yard.