Post on 05-Apr-2018
transcript
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Divisionby One DigitDivisors
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Dividing these 16 applesinto 4 equal groups,gives you 4 groups that
have 4 apples in each ofthe groups:
What are yo
u doing when
you divide? When you divide, you
are trying to splitsomething into equally
numbered groups
Take these 16 apples:
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Division by One-digit Divisors
Today you will learn how to divide a
three-digit dividend by a one-digitdivisor, to get a quotient without a
remainder
Lets review these terms
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What are the parts of a
division problem?
The dividend is the number you are dividing
The divisor is the number you are dividing by The quotient is the evenly divided result
The remainder is what is left over that cannot
be evenly divided
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When we write the problem
like this:6 2 = 3 r 0
6is the
dividend
2is the
divisor
3is the
quotient
0is the
remainder
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When writing it like this:
6, thedividend,
moves here
2, thedivisor,
moves
to here
3, thequotient,
stays
here
0is the
remainder62
3 r 0
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The Family Method
Father = Find
Mother = Multiply
Sister = Subtract
Brother = Bring Down
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Father
Father stands for find
Start by looking at the first number in the dividend
Findthe multiple of the divisor that comes closestto that number, without going higher
Use your knowledge of math facts, or amultiplication grid
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7113
Father = find the number closet to the first digit
In the3s, the numberclosest to 7, but notmore than 7, is 6
The other factor is 2
6
Put a 2 above the 7
2
2
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Mother = multiply the number that is thefactor that you found times the divisor
You found 2,multiplyit times the divisor, 3
2 times 3 equals 6
2 X 3 = 6
Put a 6 under the 7
71132
6
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Sister = subtract the number you got bymultiplying the divisor,
from the number in the dividend
You got a 6 when you multiplied
Subtract 6 from 7 7113
2
6
76 = 1
1
The difference must be smaller than the divisor!!!
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Brother = bring down the next number,from the number in the dividend
Bring down the next number inthe dividend
The new number you have is 11
Now start over again with Father for the tens
7113
2
6
11
1
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Now, lets do the last step
Father: 21 is the closestmultiple, the other factor is 7
Mother: 7 X 3 = 21, put 21 underthe 21
Sister: subtract 21 from 2121- 21 = 0
Brother: nothings left, youre done!
71132
6
11
13
9
21
21 0
7
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8644
2
8
6
6
Now, lets practice!
Father
Mother
Sister
Brother
0
2
4 8
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Now, lets do the second step
Father
Mother
Sister
86442
8
06
6
Brother
1
4
24
4
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Now, lets do the last step
Father
Mother
Sister
Brother
86442
8
06
61
4
24
24 0
6