5-3 Dividing by
One-Digit Divisor
Math Notes
Number Sense 2.2
What you’re learning today...
Number Sense 2.2 - Demonstrate proficiency
with division ... including long division with
multi-digit divisors.
What you’re learning today...
Number Sense 2.2 - Demonstrate proficiency
with division ... including long division with
multi-digit divisors.
98
1
8
1
r1
What you’re learning today...
Number Sense 2.2 - Demonstrate proficiency
with division ... including long division with
multi-digit divisors.
98
1
8
1
r1
WHAT YOU’VE
LEARNED ALREADY
What you’re learning today...
Number Sense 2.2 - Demonstrate proficiency
with division ... including long division with
multi-digit divisors.
98
1
8
1
r1
WHAT YOU’VE
LEARNED ALREADY
WHAT YOU’RE
LEARNING TO DO TODAY
What you’re learning today...
Number Sense 2.2 - Demonstrate proficiency
with division ... including long division with
multi-digit divisors.
98
1
8
1
r1
WHAT YOU’VE
LEARNED ALREADY
WHAT YOU’RE
LEARNING TO DO TODAY
9838
What you’re learning today...
Number Sense 2.2 - Demonstrate proficiency
with division ... including long division with
multi-digit divisors.
98
1
8
1
r1
WHAT YOU’VE
LEARNED ALREADY
WHAT YOU’RE
LEARNING TO DO TODAY
9838
Long Division Mnemonic
Long Division Mnemonic
DAD
Long Division Mnemonic
DAD
MOM
Long Division Mnemonic
DAD
MOM
SISTER
Long Division Mnemonic
DAD
MOM
SISTER
BROTHER
Long Division Mnemonic
DAD
MOM
SISTER
BROTHER
ROVER
Long Division Mnemonic
DAD
MOM
SISTER
BROTHER
ROVER
DIVIDE
Long Division Mnemonic
DAD
MOM
SISTER
BROTHER
ROVER
DIVIDE
MULTIPLY
Long Division Mnemonic
DAD
MOM
SISTER
BROTHER
ROVER
DIVIDE
MULTIPLY
SUBTRACT
Long Division Mnemonic
DAD
MOM
SISTER
BROTHER
ROVER
DIVIDE
MULTIPLY
SUBTRACT
BRING DOWN
Long Division Mnemonic
DAD
MOM
SISTER
BROTHER
ROVER
DIVIDE
MULTIPLY
SUBTRACT
BRING DOWN
REPEAT OR
REMAINDER
DAD
MOM
SISTER
BROTHER
ROVER
DAD
MOM
SISTER
BROTHER
ROVER
DAD
MOM
SISTER
BROTHER
ROVER
96
DAD
MOM
SISTER
BROTHER
ROVER
968
DAD
MOM
SISTER
BROTHER
ROVER
968
STEP 0: Use
guidelines
DAD
MOM
SISTER
BROTHER
ROVER
968
STEP 0: Use
guidelines
DAD
MOM
SISTER
BROTHER
ROVER
968
STEP 0: Use
guidelines
STEP 1: DIVIDE
9 by 8
DAD
MOM
SISTER
BROTHER
ROVER
968
1
STEP 0: Use
guidelines
STEP 1: DIVIDE
9 by 8
DAD
MOM
SISTER
BROTHER
ROVER
968
1
STEP 0: Use
guidelines
STEP 1: DIVIDE
9 by 8
STEP 2:
MULTIPLY
8 by 1
DAD
MOM
SISTER
BROTHER
ROVER
968
1
8
STEP 0: Use
guidelines
STEP 1: DIVIDE
9 by 8
STEP 2:
MULTIPLY
8 by 1
DAD
MOM
SISTER
BROTHER
ROVER
968
1
8
STEP 0: Use
guidelines
STEP 1: DIVIDE
9 by 8
STEP 2:
MULTIPLY
8 by 1
STEP 3:
SUBTRACT 9 - 8
DAD
MOM
SISTER
BROTHER
ROVER
968
1
8
1
STEP 0: Use
guidelines
STEP 1: DIVIDE
9 by 8
STEP 2:
MULTIPLY
8 by 1
STEP 3:
SUBTRACT 9 - 8
DAD
MOM
SISTER
BROTHER
ROVER
968
1
8
1
STEP 0: Use
guidelines
STEP 1: DIVIDE
9 by 8
STEP 2:
MULTIPLY
8 by 1
STEP 3:
SUBTRACT 9 - 8
STEP 4:
BRING DOWN the 6
DAD
MOM
SISTER
BROTHER
ROVER
968
1
8
1
STEP 0: Use
guidelines
STEP 1: DIVIDE
9 by 8
STEP 2:
MULTIPLY
8 by 1
STEP 3:
SUBTRACT 9 - 8
STEP 4:
BRING DOWN the 6
6
DAD
MOM
SISTER
BROTHER
ROVER
968
1
8
1
STEP 0: Use
guidelines
STEP 1: DIVIDE
9 by 8
STEP 2:
MULTIPLY
8 by 1
STEP 3:
SUBTRACT 9 - 8
STEP 4:
BRING DOWN the 6
6
STEP 5:
REPEAT or
REMAINDER
DAD
MOM
SISTER
BROTHER
ROVER
968
1
8
1
STEP 0: Use
guidelines
STEP 1: DIVIDE
9 by 8
STEP 2:
MULTIPLY
8 by 1
STEP 3:
SUBTRACT 9 - 8
STEP 4:
BRING DOWN the 6
6
STEP 5:
REPEAT or
REMAINDER
DAD
MOM
SISTER
BROTHER
ROVER
968
1
8
1 6
DAD
MOM
SISTER
BROTHER
ROVER
968
1
8
1 6
STEP 1: DIVIDE
16 by 8
DAD
MOM
SISTER
BROTHER
ROVER
968
1
8
1 6
STEP 1: DIVIDE
16 by 82
DAD
MOM
SISTER
BROTHER
ROVER
968
1
8
1 6
STEP 1: DIVIDE
16 by 8
STEP 2:
MULTIPLY
8 by 2
2
DAD
MOM
SISTER
BROTHER
ROVER
968
1
8
1 6
STEP 1: DIVIDE
16 by 8
STEP 2:
MULTIPLY
8 by 2
2
16
DAD
MOM
SISTER
BROTHER
ROVER
968
1
8
1 6
STEP 1: DIVIDE
16 by 8
STEP 2:
MULTIPLY
8 by 2
2
STEP 3:
SUBTRACT
16 - 16
16
DAD
MOM
SISTER
BROTHER
ROVER
968
1
8
1 6
STEP 1: DIVIDE
16 by 8
STEP 2:
MULTIPLY
8 by 2
2
STEP 3:
SUBTRACT
16 - 16
STEP 4:
Nothing to
BRING DOWN
16
00
DAD
MOM
SISTER
BROTHER
ROVER
968
1
8
1 6
STEP 1: DIVIDE
16 by 8
STEP 2:
MULTIPLY
8 by 2
2
STEP 3:
SUBTRACT
16 - 16
STEP 4:
Nothing to
BRING DOWN
16
STEP 5:
REPEAT or
REMAINDER
00
DAD
MOM
SISTER
BROTHER
ROVER
968
1
8
1 6
STEP 1: DIVIDE
16 by 8
STEP 2:
MULTIPLY
8 by 2
2
STEP 3:
SUBTRACT
16 - 16
STEP 4:
Nothing to
BRING DOWN
16
STEP 5:
REPEAT or
REMAINDER
00
DAD
MOM
SISTER
BROTHER
ROVER
968
1
8
1 6
STEP 1: DIVIDE
16 by 8
STEP 2:
MULTIPLY
8 by 2
2
STEP 3:
SUBTRACT
16 - 16
STEP 4:
Nothing to
BRING DOWN
16
STEP 5:
REPEAT or
REMAINDER
00
NO REMAINDER
Check By Multiplying
8
12
x
Check By Multiplying
8
12
x
Check By Multiplying
8
12
x
6
Check By Multiplying
8
12
x
6
1
Check By Multiplying
8
12
x
6
1
Check By Multiplying
8
12
x
6 9
1
DAD
MOM
SISTER
BROTHER
ROVER
DAD
MOM
SISTER
BROTHER
ROVER
DAD
MOM
SISTER
BROTHER
ROVER
230
DAD
MOM
SISTER
BROTHER
ROVER
2308
DAD
MOM
SISTER
BROTHER
ROVER
2308
STEP 0: Use
guidelines
DAD
MOM
SISTER
BROTHER
ROVER
2308
STEP 0: Use
guidelines
DAD
MOM
SISTER
BROTHER
ROVER
2308
STEP 0: Use
guidelines
STEP 1: Because 8
cannot go into 2,
DIVIDE 23 by 8
DAD
MOM
SISTER
BROTHER
ROVER
2308
2
STEP 0: Use
guidelines
STEP 1: Because 8
cannot go into 2,
DIVIDE 23 by 8
DAD
MOM
SISTER
BROTHER
ROVER
2308
2
STEP 0: Use
guidelines
STEP 1: Because 8
cannot go into 2,
DIVIDE 23 by 8
STEP 2:
MULTIPLY
8 by 2
DAD
MOM
SISTER
BROTHER
ROVER
2308
2
16
STEP 0: Use
guidelines
STEP 1: Because 8
cannot go into 2,
DIVIDE 23 by 8
STEP 2:
MULTIPLY
8 by 2
DAD
MOM
SISTER
BROTHER
ROVER
2308
2
16
STEP 0: Use
guidelines
STEP 1: Because 8
cannot go into 2,
DIVIDE 23 by 8
STEP 2:
MULTIPLY
8 by 2
STEP 3:
SUBTRACT 23 - 16
DAD
MOM
SISTER
BROTHER
ROVER
2308
2
16
7
STEP 0: Use
guidelines
STEP 1: Because 8
cannot go into 2,
DIVIDE 23 by 8
STEP 2:
MULTIPLY
8 by 2
STEP 3:
SUBTRACT 23 - 16
DAD
MOM
SISTER
BROTHER
ROVER
2308
2
16
7
STEP 0: Use
guidelines
STEP 1: Because 8
cannot go into 2,
DIVIDE 23 by 8
STEP 2:
MULTIPLY
8 by 2
STEP 3:
SUBTRACT 23 - 16
STEP 4:
BRING DOWN the 0
DAD
MOM
SISTER
BROTHER
ROVER
2308
2
16
7
STEP 0: Use
guidelines
STEP 1: Because 8
cannot go into 2,
DIVIDE 23 by 8
STEP 2:
MULTIPLY
8 by 2
STEP 3:
SUBTRACT 23 - 16
STEP 4:
BRING DOWN the 0
0
DAD
MOM
SISTER
BROTHER
ROVER
2308
2
16
7
STEP 0: Use
guidelines
STEP 1: Because 8
cannot go into 2,
DIVIDE 23 by 8
STEP 2:
MULTIPLY
8 by 2
STEP 3:
SUBTRACT 23 - 16
STEP 4:
BRING DOWN the 0
0
STEP 5:
REPEAT or
REMAINDER
DAD
MOM
SISTER
BROTHER
ROVER
2308
2
16
7
STEP 0: Use
guidelines
STEP 1: Because 8
cannot go into 2,
DIVIDE 23 by 8
STEP 2:
MULTIPLY
8 by 2
STEP 3:
SUBTRACT 23 - 16
STEP 4:
BRING DOWN the 0
0
STEP 5:
REPEAT or
REMAINDER
DAD
MOM
SISTER
BROTHER
ROVER
2308
2
16
7 0
DAD
MOM
SISTER
BROTHER
ROVER
2308
2
16
7 0
STEP 1: DIVIDE
70 by 8
DAD
MOM
SISTER
BROTHER
ROVER
2308
2
16
7 0
STEP 1: DIVIDE
70 by 88
DAD
MOM
SISTER
BROTHER
ROVER
2308
2
16
7 0
STEP 1: DIVIDE
70 by 8
STEP 2:
MULTIPLY
8 by 8
8
DAD
MOM
SISTER
BROTHER
ROVER
2308
2
16
7 0
STEP 1: DIVIDE
70 by 8
STEP 2:
MULTIPLY
8 by 8
8
64
DAD
MOM
SISTER
BROTHER
ROVER
2308
2
16
7 0
STEP 1: DIVIDE
70 by 8
STEP 2:
MULTIPLY
8 by 8
8
STEP 3:
SUBTRACT
70 - 64
64
DAD
MOM
SISTER
BROTHER
ROVER
2308
2
16
7 0
STEP 1: DIVIDE
70 by 8
STEP 2:
MULTIPLY
8 by 8
8
STEP 3:
SUBTRACT
70 - 64
STEP 4:
Nothing to
BRING DOWN
64
06
DAD
MOM
SISTER
BROTHER
ROVER
2308
2
16
7 0
STEP 1: DIVIDE
70 by 8
STEP 2:
MULTIPLY
8 by 8
8
STEP 3:
SUBTRACT
70 - 64
STEP 4:
Nothing to
BRING DOWN
64
STEP 5:
REPEAT or
REMAINDER
06
DAD
MOM
SISTER
BROTHER
ROVER
2308
2
16
7 0
STEP 1: DIVIDE
70 by 8
STEP 2:
MULTIPLY
8 by 8
8
STEP 3:
SUBTRACT
70 - 64
STEP 4:
Nothing to
BRING DOWN
64
STEP 5:
REPEAT or
REMAINDER
06
r6
Check By Multiplying
8
28
x
Check By Multiplying
8
28
x
Check By Multiplying
8
28
x
4
6
Check By Multiplying
8
28
x
4
6
Check By Multiplying
8
28
x
4 22
6
Check By Multiplying
8
28
x
4 22
6
6
Check By Multiplying
8
28
x
4 22
6
+6
Check By Multiplying
8
28
x
4 22
6
+6
230
DAD
MOM
SISTER
BROTHER
ROVER
DAD
MOM
SISTER
BROTHER
ROVER
DAD
MOM
SISTER
BROTHER
ROVER
1810
DAD
MOM
SISTER
BROTHER
ROVER
18109
DAD
MOM
SISTER
BROTHER
ROVER
18109
STEP 0: Use
guidelines
DAD
MOM
SISTER
BROTHER
ROVER
18109
STEP 0: Use
guidelines
DAD
MOM
SISTER
BROTHER
ROVER
18109
STEP 0: Use
guidelines
STEP 1: Because 9
cannot go into 1,
DIVIDE 18 by 9
DAD
MOM
SISTER
BROTHER
ROVER
18109
2 STEP 0: Use
guidelines
STEP 1: Because 9
cannot go into 1,
DIVIDE 18 by 9
DAD
MOM
SISTER
BROTHER
ROVER
18109
2 STEP 0: Use
guidelines
STEP 1: Because 9
cannot go into 1,
DIVIDE 18 by 9
STEP 2:
MULTIPLY
9 by 2
DAD
MOM
SISTER
BROTHER
ROVER
18109
2
18
STEP 0: Use
guidelines
STEP 1: Because 9
cannot go into 1,
DIVIDE 18 by 9
STEP 2:
MULTIPLY
9 by 2
DAD
MOM
SISTER
BROTHER
ROVER
18109
2
18
STEP 0: Use
guidelines
STEP 1: Because 9
cannot go into 1,
DIVIDE 18 by 9
STEP 2:
MULTIPLY
9 by 2
STEP 3:
SUBTRACT 18 - 18
DAD
MOM
SISTER
BROTHER
ROVER
18109
2
18
0
STEP 0: Use
guidelines
STEP 1: Because 9
cannot go into 1,
DIVIDE 18 by 9
STEP 2:
MULTIPLY
9 by 2
STEP 3:
SUBTRACT 18 - 18
DAD
MOM
SISTER
BROTHER
ROVER
18109
2
18
0
STEP 0: Use
guidelines
STEP 1: Because 9
cannot go into 1,
DIVIDE 18 by 9
STEP 2:
MULTIPLY
9 by 2
STEP 3:
SUBTRACT 18 - 18
STEP 4:
BRING DOWN the 1
DAD
MOM
SISTER
BROTHER
ROVER
18109
2
18
0
STEP 0: Use
guidelines
STEP 1: Because 9
cannot go into 1,
DIVIDE 18 by 9
STEP 2:
MULTIPLY
9 by 2
STEP 3:
SUBTRACT 18 - 18
STEP 4:
BRING DOWN the 1
1
DAD
MOM
SISTER
BROTHER
ROVER
18109
2
18
0
STEP 0: Use
guidelines
STEP 1: Because 9
cannot go into 1,
DIVIDE 18 by 9
STEP 2:
MULTIPLY
9 by 2
STEP 3:
SUBTRACT 18 - 18
STEP 4:
BRING DOWN the 1
1
STEP 4a:
Since 9 cannot go into 1, place
0 in the quotient. Bring down 0
DAD
MOM
SISTER
BROTHER
ROVER
18109
2
18
0
STEP 0: Use
guidelines
STEP 1: Because 9
cannot go into 1,
DIVIDE 18 by 9
STEP 2:
MULTIPLY
9 by 2
STEP 3:
SUBTRACT 18 - 18
STEP 4:
BRING DOWN the 1
1
0
STEP 4a:
Since 9 cannot go into 1, place
0 in the quotient. Bring down 0
DAD
MOM
SISTER
BROTHER
ROVER
18109
2
18
0
STEP 0: Use
guidelines
STEP 1: Because 9
cannot go into 1,
DIVIDE 18 by 9
STEP 2:
MULTIPLY
9 by 2
STEP 3:
SUBTRACT 18 - 18
STEP 4:
BRING DOWN the 1
1
0
0
STEP 4a:
Since 9 cannot go into 1, place
0 in the quotient. Bring down 0
DAD
MOM
SISTER
BROTHER
ROVER
18109
2
18
0
STEP 0: Use
guidelines
STEP 1: Because 9
cannot go into 1,
DIVIDE 18 by 9
STEP 2:
MULTIPLY
9 by 2
STEP 3:
SUBTRACT 18 - 18
STEP 4:
BRING DOWN the 1
1
STEP 5:
REPEAT or
REMAINDER
0
0
STEP 4a:
Since 9 cannot go into 1, place
0 in the quotient. Bring down 0
DAD
MOM
SISTER
BROTHER
ROVER
18109
2
18
0
STEP 0: Use
guidelines
STEP 1: Because 9
cannot go into 1,
DIVIDE 18 by 9
STEP 2:
MULTIPLY
9 by 2
STEP 3:
SUBTRACT 18 - 18
STEP 4:
BRING DOWN the 1
1
STEP 5:
REPEAT or
REMAINDER
0
0
STEP 4a:
Since 9 cannot go into 1, place
0 in the quotient. Bring down 0
DAD
MOM
SISTER
BROTHER
ROVER
18109
2
18
0 1
0
0
DAD
MOM
SISTER
BROTHER
ROVER
18109
2
18
0 1
STEP 1: DIVIDE
10 by 9
0
0
DAD
MOM
SISTER
BROTHER
ROVER
18109
2
18
0 1
STEP 1: DIVIDE
10 by 9
0
0
1
DAD
MOM
SISTER
BROTHER
ROVER
18109
2
18
0 1
STEP 1: DIVIDE
10 by 9
STEP 2:
MULTIPLY
9 by 1
0
9
0
1