Mathcounts Work Stretch
Flashcard
•
Mathematics
•
8th Grade
•
Practice Problem
•
Hard
+3
Standards-aligned
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the formula to calculate the time taken when two or more workers work together?
Back
If worker A takes time T_A to complete a task and worker B takes time T_B, the combined work rate is given by: \( \frac{1}{T_A} + \frac{1}{T_B} = \frac{1}{T_{combined}} \).
Tags
CCSS.HSA.CED.A.1
2.
FLASHCARD QUESTION
Front
If Eli can paint a set in 7 hours, what is his work rate in sets per hour?
Back
Eli's work rate is \( \frac{1}{7} \) sets per hour.
Tags
CCSS.HSA.CED.A.1
3.
FLASHCARD QUESTION
Front
If two workers can complete a task in a certain time, how do you find the time it would take for one worker to complete the same task alone?
Back
Use the formula: \( T_{worker} = \frac{1}{\frac{1}{T_{combined}} - \frac{1}{T_{other}}} \).
Tags
CCSS.HSA.CED.A.1
4.
FLASHCARD QUESTION
Front
How do you convert minutes into hours?
Back
To convert minutes into hours, divide the number of minutes by 60.
Tags
CCSS.4.MD.A.1
5.
FLASHCARD QUESTION
Front
What is the total time taken by Annie for her homework in minutes?
Back
Annie spends 15 + 12 + 25 = 52 minutes on her homework.
Tags
CCSS.3.MD.A.1
6.
FLASHCARD QUESTION
Front
If a task takes 9 hours for one family and twice as long for another, how long does the second family take?
Back
The second family takes 18 hours to complete the task.
7.
FLASHCARD QUESTION
Front
How do you calculate the combined work rate of two workers?
Back
Add their individual work rates: \( \text{Combined Rate} = \text{Rate}_1 + \text{Rate}_2 \).
Tags
CCSS.HSA.CED.A.1
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