Estimate Quotients
Estimate the answer:
400 ÷ 23 =
400 ÷ 20 = 5
Find the answer:
210 ÷ 15 =
210 ÷ 15 = 14
Find the answer:
91,988 ÷ 51 =
91,988 ÷ 51 = 1,803 R35
Explain when it would be useful to estimate an answer.
When it asks "about how many/much..."
When you want to check for reasonableness or when you want a starting point for an answer.
The result of a division problem is called _________.
Quotient
Estimate the answer: 597 ÷ 28 =
600 ÷ 30 = 20
Find the answer:
873 ÷ 27 =
873 ÷ 27 = 31
Find the answer:
26,878 ÷ 89 =
26,878 ÷ 89 = 302
Emily loves to read. She read 527 hours in 31 weeks. If she read an equal number of hours each week, how many hours did she read each week?
527 ÷ 31 = 17
17 hours
The number that is being divided is called the __________.
Dividend
Estimate the answer:
300 ÷ 59 =
300 ÷ 60 = 5
Find the answer:
155 ÷ 12 =
155 ÷ 12 = 12 R11
Find the answer:
15,480 ÷ 64 =
15,480 ÷ 64 =
242 R1
A farmer has 212 acres of land for sale. He divides the land into 18 equal sections. About how many acres are in each section?
212 ÷ 18 =
200 ÷ 20 = about 10 acres
Numbers in a problem that are easy to compute mentally are called ________ _________.
Compatible Numbers
Estimate the answer:
49,700 ÷ 25 =
50,000 ÷ 25 = 2,000
50,000 ÷ 20 = 2,500
Find the answer:
809 ÷ 62 =
809 ÷ 62 = 13 R3
39,788 ÷ 812 = y
y = 49
Dreanne uploads 292 pictures to her online album. Her online album shows 12 pictures on each page. How many pages does she have to show all 292 pictures?
292 ÷ 12 = 24 R4
So, 25 pages because 4 means there are 4 pictures not on those pages.
A number raised to the third power is _________.
Cubed
Estimate the answer:
89,713 ÷ 31 =
90,000 ÷ 30 = 3,000
Find the answer:
416 ÷ 18 =
416 ÷ 18 = 23 R2
Find the answer:
36,557 ÷ 263 =
36,557 ÷ 263 = 139
An average person speak 35,000 words in one week. Does the average person speak more or less than 2,500 words per day? Find the unknown in the equation 35,000 ÷ 7 = w.
The average person speaks more than 2,500 words per day.
w = 5,000 words per day
A period separating the ones and the tenths in a decimal number is called the ________ ________.
Decimal Point