Curriculum placement
Grade 1. This describes the skill, not a learner estimate.
Halves and quarters of a whole
Partition a whole into equal halves and quarters
Problem types
- Find halves or quarters
- Name halves and quarters
- Halves and quarters of one size
Builds on
Leads to
- Halves, thirds, and quarters
- Telling time to the half-hour · See it applied
Half past the hour is half of an hour, and a quarter hour is a quarter of an hour.
- Percent of a number · See it applied
One half is 50 percent and one quarter is 25 percent, which a percent grid shows by shading equal parts.
- Probability of one event · See it applied
When a spinner is split into equal parts, the chance of landing on a half or a quarter is that fraction of the whole.
Related skills
- Shapes made by putting shapes together · Related idea
Two half-circles put together make a circle, and two quarter-circles make a half-circle. Cutting a whole into equal halves and quarters runs the same idea the other way.
- Comparing two groups by matching · Related idea
Two shares are equal when neither group has more, which is the check for halves and quarters.
- Parallel lines, perpendicular lines, and symmetry · Related idea
A line of symmetry splits a shape into two equal halves that match.
Open the interactive map to explore lessons and skill connections.