Dividing with 10s
8,100 / 90 =
90
Estimate using compatible numbers.
287 / 42 =
7
Solve for the exact answer using the standard algorithm.
345 / 30 =?
11 R15
Use the standard algorithm to solve.
710 / 63 = ?
11 R17
Estimate using compatible numbers.
6,395 / 84 = ?
6,400 / 80 = 80
560 / 70 =
8
Which of the following is the best way to estimate 487 / 67 with compatible numbers?
a. 480 divided by 70
b. 485 divided by 60
c. 490 divided by 60
d. 490 divided by 70
d. 490 divided by 70
A carnival committee has purchased 1,245 small prizes. If the prizes are to be divided among the 20 game booths, how many prizes will each booth have and how many prizes will be left over? Use the standard algorithm.
62 per booth with 5 left over.
The city of Seattle has 1,242 law enforcement officers in the police department. If the officers are divided into groups of 18, how many officers will be in each group?
69 officers
Use the standard algorithm.
841 / 20 = ?
42 R1
Which of the following is another way to think of
210 / 30?
a. 210 tens and 3 tens
b. 21 tens and 30 tens
c. 21 tens and 3 tens
*Solve for 50 bonus points*
c. 21 tens / 3 tens
*7*
The length of two canals are given. About how many times as long is the Erie Canal than the Chesapeake Canal? Use estimation and compatible numbers to solve.
Chesapeake = 14 miles
Erie = 329 miles
330 / 15 = 22
About 22 times as long.
Shady Rivers summer camp has 188 campers this week. If there are 22 campers to each cabin, what is the least number of cabins needed? Use standard algorithm.
9 cabins
The table shows how many employees are going to a conference. If 27 employees can sit in each row of chairs, how many rows of chairs will they need?
Accounting = 137 employees
Marketing = 146 employees
Central Office = 41 employees
12 rows of chairs.
Use the standard algorithm.
293 / 51 = ?
5 R38
Which of the following is another way to think of
27,000 / 30?
a. 27 tens / 30 tens
b. 270 tens / 3 tens
c. 2,700 tens / 3 tens
* Solve for 50 bonus*
c. 2,700 tens / 3 tens
*900*
Use estimation and compatible numbers to solve.
2,946 / 73 =
2,800 / 70 = 40
A company ordered 384 note pads. If there are 48 note pads in each box, how many boxes were ordered?
8 boxes
The cost to rent a lodge for a reunion is $975. If 65 people attend, and pay the same price each, how much will each person pay?
$15
Use the standard algorithm.
582 / 48 = ?
12 R6
Morning Star Farm purchased 2,400 apple trees. If 80 trees can be planted on each acre of land, how many acres will be needed to plant all the trees?
30 acres of land.
Write a division and multiplication equation that represents the model below. Use your equation to solve.
1152 / 18 = 64
64 X 18 = 1152
Alberto is saving for an item that costs $1,284. He saves $75 each week. Will Alberto have enough to buy the item after 15 weeks? Explain how you know. USE DIVISION, CHECK WITH MULTIPLICATION
Alberto will not have enough. $1,284 / 75 = 17 R9. He will have enough money after 17 weeks.
Charles burns 4,350 calories hiking 15 miles of the Appalachian Trail. How many calories does he burn every mile? Estimate first and then find the exact answer.
4,500 / 15 = 300
290 calories
Identify missing or extra information.
About 300,000 Mexican Free-tailed Bats occupy the caves at Carlsbad Caverns during the summer months. Each bat can eat about 800 insects in one hour. What other information is needed to find the number of insects needed to find the number of insects a bat can eat each day?
The number of hours a bat spends eating each day.