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Grade 3 Math · World 7: Clock and Scale Canyon · Level 61
Measure to the Half Inch
Measure with a ruler marked in halves.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 61
- A ruler is a number line! The numbers are inches, and the short marks cut each inch into 2 equal parts: halves.
- Line up one end of the crayon with 0. The other end is past 3, at the half mark. The crayon is 3½ inches long.
- 3½ inches is 7 halves of an inch, like 7/2 on a number line.
- If an end is between marks, use the closest mark. That's measuring to the nearest half inch.
Georgia's K-12 Mathematics Standards:
- 3.MDR.5.4 — Use rulers to measure lengths in halves and fourths (quarters) of an inch and a whole inch.