Knowledge Explorer lesson

Telling Time: Hours and Half Hours

How do you read a clock?

An analog clock has a short hand and a long hand. The short hand is the hour hand. The long hand is the minute hand.

When the minute hand points straight up at the 12, it is exactly on the hour. If the hour hand points to the 3, it is 3 o'clock, written 3:00.

When the minute hand points straight down at the 6, it is half past the hour. Half an hour is 30 minutes, so half past 3 is written 3:30. At half past, the hour hand is halfway between two numbers.

A digital clock shows time with numbers only: the hour, a colon (:), and then the minutes.

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