5th Grade Module 2 – Lesson 28

Lesson 28: I can solve division word problems involving multi-digit division with group size unknown and the number of

groups unknown.

Time to Sprint!

Your teacher will give you the sprint.

5th Grade Module 2 – Lesson 28

Unit Conversions

1 liter = ___ mL1 foot = ___ inches1 kg = ___ g1 lb = ___ oz0.854 liters = ____ mL0.028 liters = ____ mL.123 kg = ____ g.094 kg = ____ g

5th Grade Module 2 – Lesson 28

Concept DevelopmentAva is saving for a new computer that costs $1,218. She has already saved half of the money. Ava earns $14.00 per hour. How many hours must Ava work in

order to save the rest of the money?

Solution on next slide…

5th Grade Module 2 – Lesson 28

$1218

saved still needs to save (How many 14s?)

Ava needs to work 43.5 more hours.

609 609

5th Grade Module 2 – Lesson 28

Concept DevelopmentMichael has a collection of 1,104 sports cards. He

hopes to sell the collection in packs of 36 cards and make $633.75 when all the packs are sold. If each pack is priced the same, how much should Michael

charge per pack?

Solution on next slide…

5th Grade Module 2 – Lesson 28

1404 cards

How many 36’s would fit in 1404?

Michael should charge $16.25 per pack.

36 36

5th Grade Module 2 – Lesson 28

Concept DevelopmentJim Nasium is building a tree house for his two

daughters. He cuts 12 pieces of wood from a board that is 128 inches long. He cuts 5 pieces that

measure 15.75 inches each, and 7 pieces evenly cut from what is left. Jim calculates that due to the

width of his cutting blade, he will lose a total of 2 inches of wood after making all the cuts. What is

the length of each of the seven pieces?

Solution on next slide…

5th Grade Module 2 – Lesson 28

128 inches

7 pieces from what’s left

Each of the 7 pieces is 6.75 inches long.

15.75 15.75 15.75 15.75 15.75 2

5th Grade Module 2 – Lesson 28

Concept DevelopmentA load of bricks is twice as heavy as a load of sticks. The total weight of 4 loads of bricks and 4 loads of

sticks is 771 kilograms. What is the total weight of 1 load of bricks and 3 loads of sticks?

Solution on next slide…

5th Grade Module 2 – Lesson 28

Bricks

Sticks771

771 ÷ 12 = 64.25

64.25 x 5 = 321.25

One load of bricks and 3 loads of sticks weigh 321.25 kg.

5th Grade Module 2 – Lesson 28

Get Ready to Complete theProblem Set on Your Own!

Complete Pages 2.H.10 & 2.H.11You will have 15 minutes to work.

Try your Best!

5th Grade Module 2 – Lesson 28

LET’S DEBRIEF• How are the problems alike? How are they different?

• How was your solution the same and different from those that were demonstrated?

• Did you see other solutions that surprised you or made you see the problem differently?

• Why should we assess reasonableness after solving?

• Sort the problems into those in which the group size is unknown and those in which the size of the group is unknown. There may be some that must be placed into both categories.

5th Grade Module 2 – Lesson 28

EXITTICKETPage 2.H.12