To find the unit rate for each problem, we need to divide the total amount by the total time. This tells us how much is done in
one unit of time (like 1 hour, 1 minute, or 1 day).
Here is the step-by-step solution for each question:
1. Pages per hour
* Total pages: 120
* Total hours: 5
* Calculation: $120 \div 5 = 24$
* Rate:
24 pages per hour
2. Problems per hour
* Total problems: 30
* Total hours: 2
* Calculation: $30 \div 2 = 15$
* Rate:
15 problems per hour
3. Words per hour
* Total words: 2000
* Total hours: 4
* Calculation: $2000 \div 4 = 500$
* Rate:
500 words per hour
4. Flashcards per minute
* Total flashcards: 50
* Total minutes: 20
* Calculation: $50 \div 20 = 2.5$
* Rate:
2.5 flashcards per minute
5. Songs per minute
* Total songs: 9
* Total minutes: 45
* Calculation: $9 \div 45$. Since 9 goes into 45 five times, this is $\frac{1}{5}$ or $0.2$.
* Rate:
0.2 songs per minute (or $\frac{1}{5}$ song per minute)
6. Experiments per day
* Total experiments: 15
* Total days: 5
* Calculation: $15 \div 5 = 3$
* Rate:
3 experiments per day
7. Entries per hour
* Total entries: 10
* Total hours: 2
* Calculation: $10 \div 2 = 5$
* Rate:
5 entries per hour
8. Pages per hour
* Total pages: 240
* Total hours: 12
* Calculation: $240 \div 12 = 20$
* Rate:
20 pages per hour
9. Problems per day
* Total problems: 100
* Total days: 4
* Calculation: $100 \div 4 = 25$
* Rate:
25 problems per day
10. Articles per day
* Total articles: 30
* Total days: 10
* Calculation: $30 \div 10 = 3$
* Rate:
3 articles per day
Final Answer:
1. 24 pages per hour
2. 15 problems per hour
3. 500 words per hour
4. 2.5 flashcards per minute
5. 0.2 songs per minute
6. 3 experiments per day
7. 5 entries per hour
8. 20 pages per hour
9. 25 problems per day
10. 3 articles per day
Parent Tip: Review the logic above to help your child master the concept of rates problems worksheet.