Grade 9 · lesson 2 of 4

Sum an adult weekly aerobic model

Sum an adult weekly aerobic model

About 18 minutes, plus any extended practice

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Supplied materials

  • Paper or a text document; all cases below are original fictional learning inputs.
  • An adult may read aloud; drawing or spoken answers are valid. No personal health information or physical performance is required.
  • The separate worked case gives minutesPerBlock=15, distinctBlocks=10. Multiply minutes per distinct moderate aerobic block by block count. First identify the quantities and keep their units consistent. The calculation is 15*10=150 moderate aerobic minutes/week. Round to six decimal places where needed. That result answers this supplied planning question only. It does not establish what a real person did, diagnose a condition or prove physical skill. Compare the units with the question before accepting a number.
  • Fictional case 1: minutesPerBlock=30, distinctBlocks=5. What is the modeled result using the stated method?
  • Fictional case 2: minutesPerBlock=25, distinctBlocks=6. What is the modeled result using the stated method?
  • Fictional case 3: minutesPerBlock=20, distinctBlocks=7. What is the modeled result using the stated method?
  • Fictional case 4: minutesPerBlock=40, distinctBlocks=4. What is the modeled result using the stated method?
  • Fictional case 5: minutesPerBlock=35, distinctBlocks=4. What is the modeled result using the stated method?
  • Fictional case 6: minutesPerBlock=45, distinctBlocks=3. What is the modeled result using the stated method?

Learn the idea

Adult general guidance includes at least one hundred fifty minutes of moderate aerobic activity per week, or an equivalent vigorous combination, plus muscle-strengthening on at least two days. This lesson uses a fictional twenty-year-old and only moderate aerobic blocks.

Multiply the supplied equal-duration blocks by their number. The question gives distinct blocks, not overlapping labels. A weekly aerobic total does not establish the separate muscle-days requirement or prove actual participation.

Use the invented schedule only. No workout, wearable or personal record is required. Actual activity should suit abilities and appropriate support. A paper total is descriptive planning evidence, not medical clearance or proof of health outcomes.

  1. Mark the facts or constraints in the supplied case.
  2. Apply the method explained above; draw a sequence, table or decision map.
  3. Compare your result with the worked solution and explain the difference.
  4. Complete the new cases, then check the changed-case extension.
Worked example

See the method in action

The separate worked case gives minutesPerBlock=15, distinctBlocks=10. Multiply minutes per distinct moderate aerobic block by block count. First identify the quantities and keep their units consistent. The calculation is 15*10=150 moderate aerobic minutes/week. Round to six decimal places where needed. That result answers this supplied planning question only. It does not establish what a real person did, diagnose a condition or prove physical skill. Compare the units with the question before accepting a number.

Your turn

Check your reasoning

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Helpful tips
  • Aerobic minutes do not establish muscle-strengthening days.
  • This weekly model is for an explicitly adult participant, not a 16 year-old.
Sum an adult weekly aerobic model: Fictional case 1: minutesPerBlock=30, distinctBlocks=5. What is the modeled result using the stated method?

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See the answer and explanation

150 moderate aerobic minutes/week

Multiply minutes per distinct moderate aerobic block by block count. With minutesPerBlock=30, distinctBlocks=5, calculate 30*5=150 moderate aerobic minutes/week. Results are rounded to six decimal places where needed. This is a supplied model, not a personal health assessment.

Take it further

Changed case: minutesPerBlock=20, distinctBlocks=8. Show the operation. Expected: 20*8=160 moderate aerobic minutes/week; round to six decimal places where needed, retain model limits and explain the units.

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More practice: try new cases

Choose an answer for each problem. Explain your method on paper, then use the feedback to decide what to revisit.

More practice: try new cases
1. Sum an adult weekly aerobic model: Fictional case 2: minutesPerBlock=25, distinctBlocks=6. What is the modeled result using the stated method?
Need a hint?
  • Aerobic minutes do not establish muscle-strengthening days.
  • This weekly model is for an explicitly adult participant, not a 16 year-old.
2. Sum an adult weekly aerobic model: Fictional case 3: minutesPerBlock=20, distinctBlocks=7. What is the modeled result using the stated method?
Need a hint?
  • Aerobic minutes do not establish muscle-strengthening days.
  • This weekly model is for an explicitly adult participant, not a 16 year-old.
3. Sum an adult weekly aerobic model: Fictional case 4: minutesPerBlock=40, distinctBlocks=4. What is the modeled result using the stated method?
Need a hint?
  • Aerobic minutes do not establish muscle-strengthening days.
  • This weekly model is for an explicitly adult participant, not a 16 year-old.

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