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Math Grade 4. Mrs. Ennis Simple Division Lesson Thirteen. 453 + 8971 + 36 = (3 x 3) + 8 = 57,048 – 49,892 = 324 ÷ 3 = 6 x ? = 18 How many faces on a cube? 6 quarts = _______gallons. What is the value of the 3 in 435,089?

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math grade 4

MathGrade 4

Mrs. Ennis

Simple Division

Lesson Thirteen

slide2

453 + 8971 + 36 =

(3 x 3) + 8 =

57,048 – 49,892 =

324 ÷ 3 =

6 x ? = 18

How many faces on a cube?

6 quarts = _______gallons

slide3

What is the value of the 3 in 435,089?

Brad likes to climb trees. On Monday he climbed 6 more trees than on Tuesday. On Tuesday he climbed 5 trees. On Wednesday he climbed 7 fewer trees than on Monday. How many trees did he climb on Wednesday?

slide4

10. The oil drillers drilled 18 meters in the first well but did not find oil. They drilled 6 more meters and found oil. To reach oil in the second well they had to drill twice as deep. How far did they drill the second well?

vocabulary
Vocabulary
  • dividend - the number you are dividing
  • divisor- the number you are dividing by
  • quotient - the evenly divided result
  • remainder - what is left over that cannot be evenly divided
  • divisable- can be divided by evenly
slide8

136 is the dividend

27 is the quotient

5 is the divisor

1 is the remainder

When we write the problem like this:136 ÷5 = 27 r 1

slide9

1 is the remainder

r 1

27

5, the divisor, moves to here

27, the quotient,stays here

5

136

136, the dividend, moves here

When writing it like this:

multiplication and division are opposites

Multiplication and Division are opposites:

See the Family of Facts:

4 x 3 = 12

3 x 4 = 12

12 ÷ 4 = 3

12 ÷ 3 = 4

fact family for 8 2 16 2 x 8 16 8 x 2 16 16 2 8 16 8 2
Fact Family for 8, 2,16:

2 x 8 = 16

8 x 2 = 16

16 ÷ 2 = 8

16 ÷ 8 = 2

fact family for 5 4 20 4 x 5 20 5 x 4 20 20 4 5 20 5 4
Fact Family for 5, 4, 20:

4 x 5 = 20

5 x 4 = 20

20 ÷ 4 = 5

20 ÷ 5 = 4

fact family for 6 4 24 4 x 6 24 6 x 4 24 24 4 6 24 6 4
Fact Family for 6, 4, 24:

4 x 6 = 24

6 x 4 = 24

24 ÷ 4 = 6

24 ÷ 6 = 4

slide14
Multiplication means groups of

Division means share into groups

3 x 2 means 3 groups of 2

6 ÷ 3 means 6 shared into 3 groups

slide15
Division means share into groups

12 ÷ 3 means 12 shared into 3 groups

slide16
Division means share into groups

12 ÷ 3 means 12 shared into 3 groups

12 ÷ 3 = 4

slide18

16 ÷ 4 = 4

16 ÷ 4 means 16 shared into 4 groups

slide19
Jim, Joe and Mark are sharing a pizza that is cut into 9 slices. How many slices will each person get if they split it evenly?

9 ÷ 3 =

Mark Joe Jim

slide20
Jim, Joe and Mark are sharing a pizza that is cut into 9 slices. How many slices will each person get if they split it evenly?

9 ÷ 3 = 3

Mark Joe Jim

slide21
Kasi and Kim earned $16 cutting the grass for their father? If they divided the money equally, how much did each girl earn?

16 ÷ 2 =

Kasi Kim

slide22
Kasi and Kim earned $16 cutting the grass for their father? If they divided the money equally, how much did each girl earn?

16 ÷ 2 = 8

Kasi Kim

what about remainders
What about REMAINDERS!
  • Remainders occur when a number cannot be divided equally into groups and the will be items left over.

2

r 3

5

13

Sometimes you can use mental math. It pays to memorize your

multiplication facts!

what about remainders1
What about REMAINDERS!
  • You can also use long division, but this takes longer.

6

r 3

4

27

-24

3

what about remainders2
What about REMAINDERS!
  • Let’s try another.

8

r 3

5

43

-40

3

what about remainders3
What about REMAINDERS!
  • Let’s try another.

8

r 4

7

60

-56

4

slide27
Kasi and Kim earned $18 cutting the grass for their father? If they divided the money equally, how much did each girl earn?

17 ÷ 2 =

Kasi Kim

slide28
Kasi and Kim earned $17 cutting the grass for their father? If they divided the money equally, how much did each girl earn?

17 ÷ 2 = 8 r 1

Kasi Kim

slide29
Jim, Joe and Mark are sharing a pizza that is cut into 11 slices. How many slices will each person get if they split it evenly?

11 ÷ 3 =

Mark Joe Jim

slide30
Jim, Joe and Mark are sharing a pizza that is cut into 11 slices. How many slices will each person get if they split it evenly?

11 ÷ 3 = 3 r2

Mark Joe Jim

online practice
Online Practice

http://www.arcademicskillbuilders.com/games/demolition/demolition.html

http://www.kidsnumbers.com/sunny-bunny-division.php

http://www.ixl.com/math/grade-4/division-facts-to-12-word-problems

review lesson
Review Lesson
  • Click above to watch a short video review all that we have learned.
  • Choose the Introduction to Division video.
resources
Resources:
  • http://mathlearnnc.sharpschool.com/UserFiles/Servers/Server_4507209/File/Instructional%20Resources/G4WW1-4.pdf
  • www1.pgcps.org/uploadedFiles/Region_5_Schools/.../divide.ppt
  • http://www.neok12.com/php/watch.php?v=zX676e73036d7b6e01414163&t=Division
  • http://www.arcademicskillbuilders.com/games/demolition/demolition.html
resources1
Resources:

http://www.kidsnumbers.com/sunny-bunny-division.php

  • http://www.ixl.com/math/grade-4/division-facts-to-12-word-problems