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Grade 4 Math · World 8: Measure Lab · Level 80
Elapsed Time to the Minute
Find the start, the end, or the time between.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 80
- A family leaves for a concert at quarter after nine: 9:15 a.m. The trip takes 90 minutes. When do they get there?
- Jump to the next hour first: 45 minutes takes you to 10:00. 90 minus 45 leaves 45 more minutes, so jump to 10:45.
- To find how long, add the jumps. 2:38 to 3:00 is 22 minutes, and 3:00 to 4:00 is 60 minutes. 22 plus 60 is 82 minutes.
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.