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Grade 4 Math · World 8: Measure Lab · Level 79
Hours, Minutes, and Seconds
1 hour = 60 minutes, and 1 minute = 60 seconds.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 79
- 1 hour is 60 minutes, and 1 minute is 60 seconds. A table shows more.
- Each row adds 60. 4 hours is 4 times 60: 240 minutes.
- A race takes 2 minutes and 15 seconds. 2 minutes is 120 seconds, plus 15 more: 135 seconds.
Georgia's K-12 Mathematics Standards:
- 4.MDR.6.1 — Use the four operations to solve problems involving elapsed time to the nearest minute, intervals of time, metric measurements of liquid volumes, lengths, distances, and masses of objects, including problems involving fractions with like denominators, and also problems that require expressing measurements given in a larger unit in terms of a smaller unit, and expressing a smaller unit in terms of a larger unit based on the idea of equivalence.