decimeter

Everyday

1. A decimeter is a unit of length. A decimeter is 10 centimeters, and a meter is 10 decimeters. tree →
2. It is about the width of a grown-up's hand. tree →

In the lessons

maths: a metric unit of length; conversions to centimeters and meters (1 dm = 10 cm, 1 m = 10 dm); measuring with a ruler; science: metric units go up by 10s; everyday life: rarely used outside school

Examples

• The pencil is 2 decimeters long. tree →
• 1 decimeter is 10 centimeters. tree →
• How many decimeters are in 3 meters? tree →
• The ribbon is 15 decimeters long. tree →
• A ruler 30 cm long is 3 decimeters. tree →
• A hand is about 1 decimeter wide. tree →

Note

A unit: 1 dm = 10 cm, 1 m = 10 dm. Trap: change all lengths to the same unit before adding or comparing. Short form dm. «Deci» means one tenth.