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Grade 4 Math · World 8: Measure Lab · Level 81
Measure to the Eighth Inch
Read a ruler marked in eighths of an inch.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 81
- This ruler cuts each inch into 8 equal parts: eighths. The longest marks are halves, then fourths, and the shortest are eighths.
- The key ends 3 eighths past 2. It's 2 and 3 eighths inches long.
- Eighths and fourths line up: 2 eighths is 1 fourth, and 4 eighths is 1 half.
Georgia's K-12 Mathematics Standards:
- 4.MDR.6.3 — Create dot plots to display a distribution of numerical (quantitative) measurement data.