Dividing by Estimating
236 ÷ 56 =_________
4
(236 ≅ 240, 56 ≅ 60, 240 ÷ 60 = 4)
A baker uses 3.5 pounds of flour daily.
How many ounces of flour will she use in two weeks? (1 lb=16 oz)
The baker will use 784 ounces of flour in two weeks.
Find the quotient and remainder of 34 ÷ 8 or (8⟌30).
4 R2
A number that divides another number, leaving no remainder. (ex. 2 & 4 to make 8)
What are factors?
A rectangular swimming pool has an area of 1,728 ft2 and a length of 54 meters. Find the width.
32 meters
356 ÷ 54=______
6
(356≅360, 54 ≅ 60, 360 ÷ 60= 6)
Tyler baked 702 cookies. He sold them in boxes of 18. After selling all of the boxes of cookies for the same amount each, he earned $136.50. What was the cost of one box of cookies?
$3.50
Find the quotient and remainder of 63 ÷ 5 (5⟌63).
12 R3
Find the prime number from the following list:
47 54 36 15
47
What is the formula for area?
A= l x w
873 ÷ 26= ______
30
(873 ≅ 900, 26 ≅ 30)
Michelle wants to save $150 for a trip to Six Flags. If she saves $12 each week, how many weeks will it take her to save enough money for the trip?
12.5 (13 weeks)
A number divided by 23 has a quotient of 4 with 12 as a remainder. Find the number.
104
Which number is prime and a factor of 51?
3
11
4
18
3 (No other factors besides 1 & 3; goes into 51 17 times)
A rectangular playground has an area of 2,856 square meters. If the width of the rectangle is 28 meters, find the length.
102 meters
134 ÷ 64 =______
2
(134 ≅ 140, 64 ≅ 7)
Valerie uses 12 fluid ounces of detergent each week for her laundry. If there are 75 ounces in the detergent bottle, in how many weeks will she need to buy a new bottle?
6.25 (6-7 weeks)
A number divided by 15 has a quotient of 3 with a remainder of 6. Find the number.
51
What are the first 10 prime numbers?
2, 3, 5, 7, 11, 13, 17, 19, 23, 29
The perimeter of a square field is 236 ft. The length of one side is 59 ft. Find the area.
A= 3,481 ft2
456 ÷ 87=______
5
(456 ≅ 450, 87 ≅ 90)
Mr. Morey says that 34 ÷ 8 equals 18 ÷ 4 because both are “4 R2.” Show his mistake using decimal division. ⟌
34/8 gives us 4.25, 18/4 gives us 4.5, so the two are not equal.
A number divided by 18 has a quotient of 5 with 15 as a remainder. Find the number.
105
How is a prime number different from a composite number?
A prime number has exactly two factors. A composite numbers has more than two factors.
The area of a rectangle is 256.5 m2. If the length is 18 m, what is the perimeter of the rectangle?
64.5 m