Name
Date
Time
Estimate Quotients and Discuss Estimation Strategies
✸ Read each number story carefully.
✸ Write an open number sentence to use in estimating.
✸ Answer the question, and explain your estimation strategy.
Example:
800 cups
Explain your estimation strategy: I divide to find how
many days it takes to
drink 800 cups.
Open number sentence:
Answer:
1.
2.
3.
more
800 ÷ 50
= Number of days to drink
Certain varieties of seahorses can move between 10 and 11 inches a minute.
At this rate, a seahorse travels 318 inches. Did it take more or less than
25 minutes to cover that distance?
a.
Open number sentence:
b.
Answer:
c.
Explain your estimation strategy
Orville Wright completed the first airplane flight in 1903. He traveled 10 feet per second.
If he were able to fly 126 feet, would he have stayed afloat for more or less than
50 seconds?
a.
Open number sentence:
b.
Answer:
c.
Explain your estimation strategy
In 1960, the Triton became the first submarine to circumnavigate the world. It
covered 36,014 miles in 76 days. Is that more or less than 100 miles per day?
a.
Open number sentence:
b.
Answer:
c.
Explain your estimation strategy
Source: The Kids’ World Almanac of Records and Facts
S1
Copyright © The McGraw-Hill Companies, Inc.
It is said that the Aztec king, Montezuma, drank about 50 cups of chocolate everyday.
Suppose 836 cups of chocolate were prepared. Would it take more or less than 14 days
for the king to drink all the chocolate?
Name: _________________________________ Date: ___________________ Time: _________________
Estimate Quotients and Discuss Estimation Strategies
For Problems 3–5, write an open number sentence to use
in estimating. Then answer the question.
1. Multiply.
a. 7
b. 10
2. Divide.
a. 80 ÷ 4 = ________
90 = ________
b. 3,500 ÷ 7 = ________
800 = ________
3. Marcus biked 112 miles in 5 hours. Did 4. There are 885 students at Davis
he bike more or less than 10 miles per
Middle School. They are divided into
hour?
32 homerooms. Are there more or less
than 20 students per homeroom?
a. Open number sentence:
a. Open number sentence:
_____________________________
b. Answer: _______________
_____________________________
b. Answer: _______________
5. Tommy drove 6,756 miles during June. 6. Explain how you found your estimate
On average, did he drive more or less
in Problem 5.
than 500 miles per day?
a. Open number sentence:
_____________________________
b. Answer: _______________
S2
Name: _____________________________ Date: ___________________ Time: __________
Estimate Quotients and Discuss Estimation Strategies
Write an open number sentence to use in estimating. Then
answer the question and explain your estimation strategy.
1. Jocelyn talked on the phone for a total of 242 minutes in 30 days.
Is that more or less than 15 minutes per day?
a. Open number sentence: ________________________________
b. Answer: ________________
c. Explain your estimation strategy: ___________________________
______________________________________________________
2. Emma took a trip and drove 2,032 miles in 7 days. Did she drive
more or less than 100 miles per day?
a. Open number sentence: ________________________________
b. Answer: ________________
c. Explain your estimation strategy: ___________________________
______________________________________________________
3. Malcolm’s class collected 728 cans for a food drive. There are
22 students in his class. On average, did each student collect
more or less than 50 cans?
a. Open number sentence: ________________________________
b. Answer: ________________
c. Explain your estimation strategy: ___________________________
______________________________________________________
S3