Engage NY Eureka Math 3rd Grade Module 7 Lesson 3 Answer Key
Eureka Math Grade 3 Module 7 Answer Key
Eureka Math Grade 3 Module 7 Lesson 3 Pattern Sheet Answer Key
Multiply.
multiply by 4 (1–5)
Answer:
Explanation:
4 × 1 = 4
4 × 2 = 8
4 × 3 = 12
4 × 4 = 16
4 × 5 = 20
Eureka Math Grade 3 Module 7 Lesson3 Problem Set Answer Key
Use the RDW process to solve the problems below. Use a letter to represent the unknown in each problem. When you are finished, share your solutions with a partner. Discuss and compare your strategies with your partner’s strategies.
Question 1.
Monica measures 91 milliliters of water into 9 tiny beakers. She measures an equal amount of water into the first 8 beakers. She pours the remaining water into the ninth beaker. It measures 19 milliliters. How many milliliters of water are in each of the first 8 beakers?
Answer:
Amount of water Monica pours into each of the first 8 beakers = 9 milliliters.
Explanation:
Amount of water Monica measures into 9 tiny beakers = 91 milliliters
Amount of water in ninth beaker = 19 milliliters
Amount of water Monica measures into 8 tiny beakers = Amount of water Monica measures into 9 tiny beakers – Amount of water in ninth beaker
= 91 – 19
= 72 milliliters.
Amount of water Monica pours into each of the first 8 beakers = Amount of water Monica measures into 8 tiny beakers ÷ 8
= 72 ÷ 8
= 9 milliliters.
Question 2.
Matthew and his dad put up 8 six-foot lengths of fence on Monday and 9 six-foot lengths on Tuesday. What is the total length of the fence?
Answer:
Total Length of the six-foot fence Matthew and his dad put up on Monday and Tuesday = 17.
Explanation:
Length of the six-foot fence Matthew and his dad put up on Monday = 8
Length of the six-foot fence Matthew and his dad put up on Tuesday = 9
Total Length of the six-foot fence Matthew and his dad put up on Monday and Tuesday = Length of the six-foot fence Matthew and his dad put up on Monday + Length of the six-foot fence Matthew and his dad put up on Tuesday
= 8 + 9
= 17.
Question 3.
The total weight of Laura’s new pencils is 112 grams. One pencil rolls off the scale. Now the scale reads 105 grams. What is the total weight of 7 new pencils?
Answer:
Total weight of 7 new pencils = 98 grams.
Explanation:
Total weight of Laura’s new pencils = 112 grams
Weight of the pencils scale reads now = 105 grams
Weight of One pencil rolls off the scale = Total weight of Laura’s new pencils – Weight of the pencils scale reads now
= 112 – 105
= 7 grams.
Total weight of 7 new pencils = Weight of the pencils scale reads now – Weight of One pencil rolls off the scale
= 105 – 7
= 98 grams.
Question 4.
Mrs. Ford’s math class starts at 8:15. They do 3 fluency activities that each last 4 minutes. Just when they finish all of the fluency activities, the fire alarm goes off. When they return to the room after the drill, it is 8:46. How many minutes did the fire drill last?
Answer:
Time taken for the fire drill last = 19 minutes.
Explanation:
Time of the Mrs. Ford’s math class starts = 8:15.
Time of the Mrs. Ford’s returning to the room after the drill = 8:46
They do 3 fluency activities that each last 4 minutes.
=> Time taken for 3 fluency activities = 4 × 3 = 12 minutes.
Time taken for the Mrs. Ford’s math class to end = Time of the Mrs. Ford’s math class starts + Time taken for 3 fluency activities
= 8:15 + 0:12
= 8:27.
Time taken for the fire drill last = Time of the Mrs. Ford’s returning to the room after the drill – Time taken for the Mrs. Ford’s math class to end
= 8:46 -8:27
= 19 minutes.
Question 5.
On Saturday, the baker bought a total of 150 pounds of flour in five-pound bags. By Tuesday, he had 115 pounds of flour left. How many five-pound bags of flour did the baker use?
Answer:
Amount of five-pound bags of flour used by the baker = 35 pounds.
Explanation:
Amount of total flour bought on Saturday in five-pound bags = 150 pounds.
Amount of flour left by Tuesday = 115 pounds
Amount of five-pound bags of flour used by the baker = Amount of total flour bought on Saturday in five-pound bags – Amount of flour left by Tuesday
= 150 – 115
= 35 pounds.
Question 6.
Fred cut an 84-centimeter rope into 2 parts and gave his sister 1 part. Fred’s part is 56 centimeters long. His sister cut her rope into 4 equal pieces. How long is 1 of his sister’s pieces of rope?
Answer:
Length of each piece of rope Fred’s sister makes = 7 centimeters.
Explanation:
Total length of the Fred rope had= 84 centimeter
Length of Fred’s rope part= 56 centimeters
Length of Fred’s sister part rope = Total length of the Fred rope had – Length of Fred’s rope part
= 84 – 56
= 28.
His sister cut her rope into 4 equal pieces.
=> Number of pieces of rope Fred’s sister makes = 4
=> Length of each piece of rope Fred’s sister makes = Length of Fred’s sister part rope ÷ Number of pieces of rope Fred’s sister makes
= 28 ÷ 4
= 7 centimeters.
Eureka Math Grade 3 Module 7 Lesson 3 Exit Ticket Answer Key
Use the RDW process to solve the problem below. Use a letter to represent the unknown.
Twenty packs of fruit snacks come in a box. Each pack weighs 6 ounces. Students eat some. There are 48 ounces of fruit snacks left in the box. How many ounces of fruit snacks did the students eat?
Answer:
Weight of packs of fruit snacks students ate = 72 ounces.
Explanation:
Weight of each pack = 6 ounces.
Number of fruit snacks come in a box = 20
Weight of 20 pack of fruit snacks = 20 × 6 = 120 ounces.
Weight of packs of fruit snacks left over in the box = 48 ounces
Weight of packs of fruit snacks students ate = Weight of 20 pack of fruit snacks + Weight of packs of fruit snacks left over in the box
= 120 – 48
= 72 ounces.
Eureka Math Grade 3 Module 7 Lesson 3 Homework Answer Key
Use the RDW process to solve the problems below. Use a letter to represent the unknown in each problem.
Question 1.
Jerry pours 86 milliliters of water into 8 tiny beakers. He measures an equal amount of water into the first 7 beakers. He pours the remaining water into the eighth beaker. It measures 16 milliliters. How many milliliters of water are in each of the first 7 beakers?
Answer:
Amount of water he pours equally into the each first seven beakers = 10 milliliters.
Explanation:
Amount of water Jerry pours into 8 tiny beakers = 86 milliliters
Amount of water he pours into the eighth beaker = 16 milliliters
Amount of water he pours into the first seven beakers = Amount of water Jerry pours into 8 tiny beakers – Amount of water he pours into the eighth beaker
= 86 – 16
= 70 milliliters.
Number of first beakers = 7
Amount of water he pours equally into the each first seven beakers = Amount of water he pours into the first seven beakers ÷ Number of beakers
= 70 ÷ 7
= 10 milliliters.
Question 2.
Mr. Chavez’s third graders go to gym class at 11:15. Students rotate through three activities for 8 minutes each. Lunch begins at 12:00. How many minutes are there between the end of gym activities and the beginning of lunch?
Answer:
Time taken between the end of gym activities and the beginning of lunch = 21 minutes.
Explanation:
Time of Mr. Chavez’s third graders go to gym class = 11:15
Time of they Lunch begins = 12:00
Students rotate through three activities for 8 minutes each.
=> Time taken for three activities = 8 × 3 = 24 minutes.
Time totally taken for the gym activities = Time of Mr. Chavez’s third graders go to gym class + Time taken for three activities
= 11:15 + 24
= 11:39.
Time taken between the end of gym activities and the beginning of lunch = Time of they Lunch begins – Time totally taken for the gym activities
=12:00 – 11.39
= 21 minutes.
Question 3.
A box contains 100 pens. In each box there are 38 black pens and 42 blue pens. The rest are green pens. Mr. Cane buys 6 boxes of pens. How many green pens does he have in total?
Answer:
Number of Green pens Mr. Cane has = 120.
Explanation:
Number of pens a box contains = 100
Number of Black pens present in each box = 38
Number of Blue pens present in each box = 42
Number of Green pens present in each box = Number of pens a box contains – ( Number of Black pens present in each + Number of Blue pens present in each box )
= 100 – ( 38 + 42)
= 100 – 80
= 20.
Number of boxes of pens Mr. Cane buys = 6
Number of Green pens Mr. Cane has = Number of Green pens present in each box × Number of boxes of pens Mr. Cane buys
= 20 × 6
= 120.
Question 4.
Greg has $56. Tom has $17 more than Greg. Jason has $8 less than Tom.
a. How much money does Jason have?
b. How much money do the 3 boys have in total?
Answer:
a. Amount of money Jason has = $65.
b. Total amount of money 3 boys have = $194.
Explanation:
Amount of money Greg has = $56
Tom has $17 more than Greg.
=> Amount of money Tom has = Amount of money Greg has + $17
= $56 + $17
= $73.
a) Jason has $8 less than Tom.
=> Amount of money Jason has = Amount of money Tom has – $8
= $73 – $8
= $65.
b) Amount of money Greg has = $56
Amount of money Tom has = $73
Amount of money Jason has = $65.
Total amount of money 3 boys have = Amount of money Greg has + Amount of money Tom has + Amount of money Jason has
= $56 + $73 + $65
= $129 + $ 65
= $194.
Question 5.
Laura cuts 64 inches of ribbon into two parts and gives her mom one part. Laura’s part is 28 inches long. Her mom cuts her ribbon into 6 equal pieces. How long is one of her mom’s pieces of ribbon?
Answer:
Length of the each pieces her moms cut her ribbon part = 6 inches.
Explanation:
Total Length of ribbon Laura has = 64 inches
Length of Ribbon Laura’s part = 28 inches
Length of Ribbon Laura’s mom’s part = Total Length of ribbon Laura has – Length of Ribbon Laura’s part
= 64 – 28
= 36
Number of equal pieces her moms cut her ribbon part = 6
Length of the each pieces her moms cut her ribbon part = Length of Ribbon Laura’s mom’s part ÷ Number of equal pieces her moms cut her ribbon part
= 36 ÷ 6
= 6 inches.