Curriculum placement
Grade 1. This describes the skill, not a learner estimate.
Telling time to the half-hour
Read clocks to the hour and half hour
Problem types
- Read hours and half hours
- Name the hour
- Find the clock for a time
Builds on
- Counting by ones and by tens
- Halves and quarters of a whole · Useful idea
Half past the hour is half of an hour, and a quarter hour is a quarter of an hour.
Leads to
- Telling time to five minutes
- Unit fractions of a whole · Extend the idea
A half hour is one of two equal parts of an hour, and a quarter hour is one of four equal parts, so the clock shows unit fractions.
Related skills
- Recognizing equivalent fractions · Related idea
One half hour and two quarter hours are the same 30 minutes, so 1/2 equals 2/4 of an hour.
- Fractions on a number line · Related idea
Marking half hours on a timeline places 1/2 between 0 and 1 hour, the same way fractions are placed on a number line.
- Counting on and counting back · Shared foundations
- Skip-counting · Shared foundations
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