Question

Which statement about converting metric units of measurement is true? Use the metric table to help answer the question.

Metric Table
kilo-
hecto-
deka-
unit
deci-
centi-
milli-
1,000
100
10
1
0.1
0.01
0.001
To find the number of hectometers in 87 centimeters, move the decimal point 4 units to the left.
To find the number of meters in 9,382 centimeters, move the decimal point 2 units to the right.
To find the number of kilometers in 6.39 decimeters, move the decimal point 3 units to the left.
To find the number of dekameters in 18 kilometers, move the decimal point 3 units to the right.

Answer 1

The first statement is true.

Explanation:
- 87 centimeters → hectometers: centi → deci → unit → deka → hecto = 4 steps toward larger units, so move the decimal 4 places left (87 cm = 0.0087 hm).
- The others are false:
- 9,382 cm → m: move 2 places left (9,382 cm = 93.82 m), not right.
- 6.39 dm → km: deci → unit → deka → hecto → kilo = 4 steps left (6.39 dm = 0.000639 km), not 3.
- 18 km → dam: kilo → hecto → deka = 2 steps right (18 km = 1,800 dam), not 3.