Common Core Math: Grade 1: Measurement & Data
In first grade, students measure lengths and sort objects based on their lengths. Students take measurements in various units, including standard units (such as inches or centimeters) and units defined by lengths of shorter objects. Students also learn to tell time to the nearest half-hour and learn to analyze and represent categorical data.
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Tell time to the nearest half-hour.
Tell and write time (CCSS.Math.Content.1.MD.B.3):
Measure and reason with lengths of objects.