Question

true or false: a decimeter, a centimeter, and a millimeter are all smaller than a meter. choose one option
a true
b false

Explanation:

To determine if a decimeter, centimeter, and millimeter are smaller than a meter, we use metric unit conversions.

• 1 meter ($m$) = 10 decimeters ($dm$), so 1 decimeter = $\frac{1}{10}$ meter = 0.1 meter (which is less than 1 meter).
• 1 meter = 100 centimeters ($cm$), so 1 centimeter = $\frac{1}{100}$ meter = 0.01 meter (less than 1 meter).
• 1 meter = 1000 millimeters ($mm$), so 1 millimeter = $\frac{1}{1000}$ meter = 0.001 meter (less than 1 meter).

Since decimeter, centimeter, and millimeter each represent a fraction of a meter (less than 1 meter), they are all smaller than a meter.

Answer:

A. True