2. • Dividing these 16 apples
into 4 equal groups,
gives you 4 groups that
have 4 apples in each of
the groups:
What are you doing when
you divide?
• When you divide, you
are trying to split
something into equally
numbered groups
• Take these 16 apples:
3. Division by One-digit Divisors
• Today you will learn how to divide a
three-digit dividend by a one-digit
divisor, to get a quotient without a
remainder
• Let’s review these terms
4. 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
5. When we write the problem
like this:
136 5 = 27 r 1
136
is the
dividend
5
is the
divisor
27
is the
quotient
1
is the
remainder
6. When writing it like this:
136, the
dividend,
moves here
5, the
divisor,
moves
to here
27, the
quotient,
stays
here
1 is the
remainder
136
5
27 r 1
7. How do you solve a
division problem?
• Solving a division problem is a step by step
process
• The method we will learn today is based the
words for the people in our families.
• They are:
Father Mother Sister Brother
9. Father
• Father stands for find
• Start by looking at the first number in the dividend
• Find the multiple of the divisor that comes closest
to that number, without going higher
• Use your knowledge of math facts, or a
multiplication grid
10. 711
3
Father = find the number closet to the first digit
• In the 3’s, the number
closest to 7, but not
more than 7, is 6
• The other factor is 2
6
• Put a 2 above the 7
2
2
11. Mother = multiply the number that is the
factor that you found times the divisor
• You found 2, multiply
it times the divisor, 3
• 2 times 3 equals 6
2 X 3 = 6
• Put a 6 under the 7
711
3
2
6
12. Sister = subtract the number you got by
multiplying the divisor,
from the number in the dividend
• You got a 6 when you multiplied
• Subtract 6 from 7
711
3
2
6
• 7 – 6 = 1
–
1
• The difference must be smaller than the divisor!!!
13. Brother = bring down the next number,
from the number in the dividend
• Bring down the next number in
the dividend
• The new number you have is 11
• Now start over again with Father for the ten’s
711
3
2
6
–
11
1
14. Now, let’s do the second step
• Father: 9 is the closest multiple,
the other factor you found is 3
• Mother: 3 X 3 = 9, put a 9 under
the 11
• Sister: subtract 9 from 11
11- 9 = 2
711
3
2
6
–
11
1
• Brother: bring down the 1
3
9
–
21
15. Now, let’s do the last step
• Father: 21 is the closest
multiple, the other factor is 7
• Mother: 7 X 3 = 21, put 21 under
the 21
• Sister: subtract 21 from 21
21- 21 = 0
• Brother: nothing’s left, you’re done!
711
3
2
6
–
11
1
3
9
–
21
21
–
0
7
17. Now, let’s do the second step
• Father
• Mother
• Sister
864
4
2
8
–
06
6
• Brother
1
4
–
24
4
18. Now, let’s do the last step
• Father
• Mother
• Sister
• Brother
864
4
2
8
–
06
6
1
4
–
24
24
–
0
6
19. • Finish the rest of the worksheet
• Homework: probs. 1-10, p. 64 in text
• Go to this icon on the class’
computers for extra practice if you have
free time
• Look for the same icon on the class’
website for practice at home
What do I do with division now?
