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Lesson 29: I can solve division word problems involving multi-digit division with group size unknown and the number of groups unknown. 5th Grade Module 2 – Lesson 29 Unit Conversions .013 =g=____ gmL liter =___ ___ mL inches 0.052 .397 1foot lb =kg oz ____ 0.413 1 1kg =liters ___ 5th Grade Module 2 – Lesson 29 Divide Decimals by Two-Digit Numbers 8.61 4.9 .32 8.4 24 ÷÷÷16 14 40 21===____ ____ ____ 5th Grade Module 2 – Lesson 29 Application Problem A one-year (52 week) subscription to a weekly magazine is $39.95. Greg calculates that he would save $219.53 if he subscribed to the magazine instead of purchasing it each week at the store. What is the price of the individual magazine at the store? 5th Grade Module 2 – Lesson 29 Application Problem A one-year (52 week) subscription to a weekly magazine is $39.95. Greg calculates that he would save $219.53 if he subscribed to the magazine instead of purchasing it each week at the store. What is the price of the individual magazine at the store? 219.53 + 39.95 = 259.48 259.48 ÷ 52 = 4.99 5th Grade Module 2 – Lesson 29 Concept Development Lamar has 1354.5 kilograms of potatoes to deliver in equal amounts to 18 stores. 12 of the stores are in the Bronx. How many kilograms of potatoes will he deliver to stores in the Bronx? Will the amount delivered to the Bronx be more or less than half of the total amount? How do you know? 5th Grade Module 2 – Lesson 29 1354.5 12 stores in Bronx 1354.5 ÷ 18 = 75.25 75.25 x 12 = 903 kg The stores in the Bronx receive 903 kg of potatoes. 5th Grade Module 2 – Lesson 29 Concept Development Valerie uses 12 oz of detergent each week for her laundry. If there are 75 oz of detergent in the bottle, in how many weeks will she need to buy a new bottle of detergent? Solution on next slide… 5th Grade Module 2 – Lesson 29 75 oz 12 ? 12 How many 12’s would fit in 75? Valerie will have to buy detergent after 6 weeks because she won’t have enough for a 7th week. 5th Grade Module 2 – Lesson 29 Concept Development Jim 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 29 128 inches 15.75 15.75 15.75 15.75 15.75 2 7 pieces from what’s left Each of the 7 pieces is 6.75 inches long. 5th Grade Module 2 – Lesson 29 Concept Development The area of a rectangle is 56.96 square meters. If the length is 16 m, what is its perimeter? Solution on next slide… 5th Grade Module 2 – Lesson 29 16 x ? = 56.96 16 ? Area = 56.96 16 The perimeter is 39.12 meters. 5th Grade Module 2 – Lesson 29 ? Concept Development A city block is 3 times as long as it is wide. If the total distance around the block is 0.48 kilometers, what is the area of the block in square meters? Solution on next slide… 5th Grade Module 2 – Lesson 29 One side 60 width 60 60 60 .48 km 480 m length One side One side One side 480 ÷ 8 = 60 m per unit. 60 x 180 = 10,800. The area of the block is 10,800 square meters. 5th Grade Module 2 – Lesson 29 Get Ready to Complete the Problem Set on Your Own! Complete Pages 2.H.21 & 2.H.22 You will have 15 minutes to work. Try your Best! 5th Grade Module 2 – Lesson 29 • What did the divisor represent in each equation? • What did the unknown represent for each? • How did that change the model you drew? • Which is easier to draw? 5th Grade Module 2 – Lesson 29 EXIT TICKET Page 2.H.23 5th Grade Module 2 – Lesson 29