DIVISION STRATEGIES

MAFS.3.OA.3.7

LESSON OPENINGSolve for the variable in each equation:

1) 8 × m = 322) 18 ÷ j = 93) p × 7 = 214) 17 – f = 11

DIVISION STRATEGIES

In Unit 3, Understand Division, we used different strategies to divide.

Do you remember any of the strategies?

Draw groups

Use a number line

Repeated Subtraction

Make an array

Think multiplication!

LET’S REVIEW THESE STRATEGIESD O YO U R E M E M B E R T H E S E ?

You will make this foldable as we go through

the PowerPoint today!

DRAW GROUPSMs. Percy has 12 pencils. She wants to give 3 students

an equal number of pencils. How many pencils will each student get?

DRAW GROUPSMs. Percy has 12 pencils. She wants to give 3 students

an equal number of pencils. How many pencils will each student get?

DRAW GROUPSMs. Percy has 12 pencils. She wants to give 3 students an equal number of pencils. How many pencils will

each student get?

DRAW GROUPSMs. Percy has 12 pencils. She wants to give 3 students an equal number of pencils. How many pencils will

each student get?

Each student will get 4 pencils.

DRAW GROUPSMs. Percy has 12 pencils. She wants to give 3 students an equal number of pencils. How many pencils will each student get?

Each student will get 4 pencils. When it asks, how many will EACH get, it is the same as asking how many will ONE

GROUP get!

12 (pencils) ÷ 3 (students) = 4 (pencils each student gets)

MAKE YOUR FOLDABLE / INTERACTIVE NOTEBOOK

DRAW GROUPS

MAKE GROUPSMrs. Andersen has 15 tacos. She wants to

put 3 tacos on each plate. How many plates will Ms. Andersen need for all of her tacos to be

on a plate?

I can draw circles around every 3 tacos. Then I count

all the groups I made.

MAKE GROUPSMrs. Andersen has 15 tacos. She wants to

put 3 tacos on each plate. How many plates will Ms. Andersen need for all of her tacos to be

on a plate?

I can draw circles around every 3 tacos. Then I count

all the groups I made.

MAKE GROUPSMrs. Andersen has 15 tacos. She wants to

put 3 tacos on each plate. How many plates will Ms. Andersen need for all of her tacos to be

on a plate?

I can draw circles around every 3 tacos. Then I count

all the groups I made.

MAKE GROUPSMrs. Andersen has 15 tacos. She wants to

put 3 tacos on each plate. How many plates will Ms. Andersen need for all of her tacos to be

on a plate?

I can draw circles around every 3 tacos. Then I count

all the groups I made.

MAKE GROUPSMrs. Andersen has 15 tacos. She wants to

put 3 tacos on each plate. How many plates will Ms. Andersen need for all of her tacos to be

on a plate?

I can draw circles around every 3 tacos. Then I count

all the groups I made.

MAKE GROUPSMrs. Andersen has 15 tacos. She wants to

put 3 tacos on each plate. How many plates will Ms. Andersen need for all of her tacos to be

on a plate?

So, Ms. Andersen will need 5 plates.

1 2 3 4 5

MAKE YOUR FOLDABLE / INTERACTIVE NOTEBOOK

MAKE GROUPS

USE A NUMBER LINEPedro has 15 books he wants to put equally on

bookshelves. He has 3 bookshelves. How many books can go on each shelf?

15- 3

12

12- 3 9

9- 3 6

6- 3 3

3- 3 0

USE A NUMBER LINEPedro has 15 books he wants to put equally on

bookshelves. He has 3 bookshelves. How many books can go on each shelf?

15- 3

12

12- 3 9

9- 3 6

6- 3 3

3- 3 0

Pedro can put 5 books on each shelf. The number line shows

15 ÷ 3 = 5

MAKE YOUR FOLDABLE / INTERACTIVE NOTEBOOK

USE A NUMBER

LINE

Christine wants to plant vegetables. She has

24 vegetables and wants to put them in 3 rows. How many vegetables will go in each

row?

Make an array.Get out 24 tiles.

Start to arrange them in 3 rows.

MAK

E AN

ARR

AY

Christine wants to plant vegetables. She has

24 vegetables and wants to put them in 3 rows. How many vegetables will go in each

row?1

2

3

3

MAK

E AN

ARR

AY

Christine wants to plant vegetables. She has

24 vegetables and wants to put them in 3 rows. How many vegetables will go in each

row?1

2

3

4

5

6

3

MAK

E AN

ARR

AY

Christine wants to plant vegetables. She has

24 vegetables and wants to put them in 3 rows. How many vegetables will go in each

row?1

2

3

4

5

6

7

8

9

3

MAK

E AN

ARR

AY

Christine wants to plant vegetables. She has

24 vegetables and wants to put them in 3 rows. How many vegetables will go in each

row?1

2

3

4

5

6

7

8

9

101112

3

MAK

E AN

ARR

AY

Christine wants to plant vegetables. She has

24 vegetables and wants to put them in 3 rows. How many vegetables will go in each

row?1

2

3

4

5

6

7

8

9

101112

131415

3

MAK

E AN

ARR

AY

Christine wants to plant vegetables. She has

24 vegetables and wants to put them in 3 rows. How many vegetables will go in each

row?1

2

3

4

5

6

7

8

9

101112

131415

161718

3

MAK

E AN

ARR

AY

Christine wants to plant vegetables. She has

24 vegetables and wants to put them in 3 rows. How many vegetables will go in each

row?1

2

3

4

5

6

7

8

9

101112

131415

161718

192021

3

MAK

E AN

ARR

AY

Christine wants to plant vegetables. She has

24 vegetables and wants to put them in 3 rows. How many vegetables will go in each

row?1

2

3

4

5

6

7

8

9

101112

131415

161718

192021

222324

3

MAK

E AN

ARR

AY

Christine wants to plant vegetables. She has

24 vegetables and wants to put them in 3 rows. How many vegetables will go in each

row?1

2

3

4

5

6

7

8

9

101112

131415

161718

192021

222324

Since there are 8 tiles in

each row there will be 8 vegetables in each row.

3

8

MAK

E AN

ARR

AY

MAKE YOUR FOLDABLE / INTERACTIVE NOTEBOOK

MAKE AN

ARRAY

REPEATED SUBTRACTIONChris has $12 for the book fair. Each book

he wants to buy cost $4. How many books can Chris buy?

12- 4 8

Chris buys one book, spends $4, and has $8 left.

Can he buy another book?

$4

REPEATED SUBTRACTIONChris has $12 for the book fair. Each book

he wants to buy cost $4. How many books can Chris buy?

12- 4 8

Chris buys another book, spends another $4, and has $4 left.

Can he buy another book?

8- 4 4

$4 $4

REPEATED SUBTRACTIONChris has $12 for the book fair. Each book

he wants to buy cost $4. How many books can Chris buy?

12- 4 8

Chris buys another book, spends another $4, and has $0 left.

Can he buy another book?

8- 4 4

4- 4 0

$4 $4

$4

REPEATED SUBTRACTIONChris has $12 for the book fair. Each book

he wants to buy cost $4. How many books can Chris buy?

12- 4 8

Chris spent $4 three times. He subtracted $4 three times.

So, 12 ÷ 4 = 3. He can buy 3 books.

8- 4 4

4- 4 0

$4 $4

$4

MAKE YOUR FOLDABLE / INTERACTIVE NOTEBOOKREPEATED SUBTRACTION

THINK MULTIPLICATION

20 ÷ 4 = __

Let’s use multiplication to help us.

THINK MULTIPLICATION

20 ÷ 4 = __

Let’s use multiplication to help us.

is the same thing as

4 x ____ = 20

THINK MULTIPLICATION

20 ÷ 4 = __

I know that 4 × 5 = 20, so 20 ÷ 4 is equal to 5.

is the same thing as

4 × ____ = 20

MAKE YOUR FOLDABLE / INTERACTIVE NOTEBOOK

THINK MULTIPLICATION

Now you’ve rev iewed a l l the d iv is ion s t rateg ies .

WHAT IS THE MOST EFFICIENT STRATEGY? WHY?

Now you’ve rev iewed a l l the d iv is ion s t rateg ies .

WHAT IS THE STRATEGY YOU WANT TO USE

MOST OFTEN?

EXIT TICKET1)Use a strategy you reviewed today to solve for m:

m = 72 ÷ 8

2) Tito has 36 tomato plants in his garden. His garden is organized with the same number of tomato plants in each row. If he has 4 plants in each row, how many rows are in Tito’s garden?