Measurement
Length
The distance between 2 points
Customary
Metric
Inches (in)
Millimeter (mm)
Feet (ft)
Centimeter( cm)
Yards (yd)
Meters (m)
Miles (mi)
Kilometers (km)
Converting (Customary)
12
Inches = 1 Foot
3
36
Feet = 1 Yard
Inches = 1 Yard
5280
Feet = 1 Mile
1760
Yards = 1 Mile
Question: How many feet are in 5 miles?
12 inches = 1 foot
Write the question:
5 miles = _______ feet
Set up the proportion:
5280 feet =
1 mile
___ feet
5 miles
Choose the ratio:
5280 feet
1 mile
3 feet = 1 yard
36 inches – 1 yard
5280 feet = 1 mile
1760 yards = 1 mile
Solve
5280 feet x 5
=
1 mile x 5
26,400 feet
5 miles
So, 5 miles = 26,400 feet
Question: How many yards are in 48 feet?
12 inches = 1 foot
Write the question:
48 feet = _______ yards
Set up the proportion:
3 feet
1 yard
=
48 feet
yards
Choose the ratio:
3 feet = 1 yard
36 inches – 1 yard
3 feet
1 yard
5280 feet = 1 mile
1760 yards = 1 mile
Solve
3 feet x 16 =
1 yard x 16
48 feet
16 yards
So, 48 feet = 16 yards
Question: How many inches are in 10 feet?
12 inches = 1 foot
Write the question:
10 feet = _______ inches
Set up the proportion:
12 inches =
1 foot
inches
10 feet
Choose the ratio:
3 feet = 1 yard
12 inches
1 foot
36 inches – 1 yard
5280 feet = 1 mile
1760 yards = 1 mile
Solve
12 inchesx 10 =
1 foot x 10
120 inches
10 feet
So, 10 feet = 120 inches
Converting (Metric)
10
mm = 1 cm
100
cm = 1 meter
1000
meters = 1 km
Question: How many cm are in 120 mm?
10 mm = 1 cm
Write the question:
Choose the ratio:
Set up the proportion:
=
120 mm
cm
1000 meters = 1 km
10 mm
1 cm
120 mm = _______ cm
10 mm
1 cm
100 cm = 1 meter
Solve
10 mm
1 cm
x 12
=
x 12
120 mm
12 cm
So, 120 mm = 12 cm
Question: How many cm are in 100 m?
10 mm = 1 cm
Write the question:
Choose the ratio:
Set up the proportion:
=
cm
100 m
1000 meters = 1 km
100 cm
1m
100 m = _______ cm
100 cm
1m
100 cm = 1 meter
Solve
100 cm
1m
x 100
=
x 100
10,000 cm
100 m
So, 100 m = 10,000 cm
Question: How many m are in 50 km?
10 mm = 1 cm
Write the question:
Choose the ratio:
50 km = _______ m
1000 m
1 km
Set up the proportion:
1000 m
1 km
=
m
50 km
100 cm = 1 meter
1000 meters = 1 km
Solve
1000 m
1 km
x 50
=
x 50
50,000 m
50 km
So, 50 km = 50,000 m