Estimating Quotients
Exact Quotients
Divide Mentally
Factors and Divisibility Rules
Word Problems
100
Use rounding or Compatible numbers: 42 / 5
What is 40 / 5 = 8 or 45 / 5 = 9
100
Some quotients may contain remainders 632 / 4
What is 158 !
100
80 / 8
What is 10
100
List ALL of the factors of 8
What is 1, 2, 4, 8 (1 x 8 and 2 x 4)
100
2 best friends want to share 5 cookies equally. How many whole cookies will each friend eat?
What is 2 cookies (2r1 we ignore the remainder because the question asks for whole cookies eaten)
200
Use rounding or compatible numbers 156 / 6
What is 160 / 6 = 10
200
Some quotients may contain remainders 1,562 / 5
What is 312 r2
200
900 / 10
What is 90
200
How do you know if number is divisible by 6?
What is it is divisible by 2 (ends in an even number) and it is divisible by 3 (the sum of the digits is a multiple of 3)
200
35 choir students are going on a field trip the retirement center. If there needs to be an adult chaperone for each group of 8 singers, how many adults will need to go?
What is 5 adults (4r3, you must round the answer up to include an adult chaperone for the remaining 3 choir students)s
300
Use rounding or compatible numbers 4755 / 12
What is 4,800 / 12 = 400
300
Some quotients may contain remainders 1,692 / 12
What is 141
300
16,000 / 80
What is 200
300
List ALL of the Factors of 18
What is 1,2,3,6,9,18 ( 1x18 , 2x9, 3x6)
300
The State Park is planting 257 trees in 9 areas throught the park. Each area will have an equal number of trees planted. How many trees will not be planted?
What is 5 trees. (257 / 9 = 28r5 this means that there will be 28 trees planted in each of the 9 areas, and 5 trees left over that will not be shared equally and therefore will not be planted.)
400
Use rounding or compatible numbers 7,257 / 20
What is 8,000 / 20 = 400
400
Some quotients may contain remainders 768 / 15
What is 51 r 3
400
120,000 / 400
What is 300
400
Is 6,831 divisible by 9? What is the rule?
What is YES a number is divisible by 9 if the sum of the digits is a multiple of 9
400
Three yards of fabric will be cut into 8 inch pieces for a Halloween costume. How many peices will be cut?
What is 13 pieces 3ft = 1 yard so 9ft = 3 yards therefore 108 total inches 108 / 8 = 13r4
500
Use rounding or compatible numbers 12,345 / 250
What is 10,000 / 250 = 40 or 12,500 / 250 = 50
500
Some quotients may contain remainders 5,775 / 25
What is 231
500
5,600,000 / 70
What is 80,000
500
List ALL the factors of 36
What is 1,2,3,4,6,9,12,18,32 (1x36, 2x18, 3x12, 4x9, 6x6)
500
Four siblings earned $210 for the fund run. If each sibling raised the same amount of money, how much did each sibling raise?
What is $52.50 $210 / 4 = $52r$2 the remainder can be treated as a decimal and be divided further. $210.00 / 4 = $52.50