## Engage NY Eureka Math 4th Grade Module 1 Lesson 2 Answer Key

### Eureka Math Grade 4 Module 1 Lesson 2 Problem Set Answer Key

Question 1.
As you did during the lesson, label and represent the product or quotient by drawing disks on the place value chart.
a. 10 × 2 thousands = _________ thousands = ______________________________

b. 10 × 3 ten thousands = _________ ten thousands = ______________________________

c. 4 thousands ÷ 10 = __________ hundreds ÷ 10 = _____________________________

Question 2.
Solve for each expression by writing the solution in unit form and in standard form.

 Expression Unit form Standard Form 10 × 6 tens 7 hundreds × 10 3 thousands ÷ 10 6 ten thousands ÷ 10 10 × 4 thousands

 Expression Unit form Standard Form 10 × 6 tens 60 tens 600 7 hundreds × 10 70 hundreds 7000 3 thousands ÷ 10 3 hundreds 300 6 ten thousands ÷ 10 6 thousands 6000 10 × 4 thousands 40 thousands or 4 ten thousands 40,000

Question 3.
Solve for each expression by writing the solution in unit form and in standard form.

 Expression Unit form Standard Form (4 tens 3 ones) × 10 (2 hundreds 3 tens) × 10 (7 thousands 8 hundreds) × 10 (6 thousands 4 tens) ÷ 10 (4 ten thousands 3 tens) ÷ 10

 Expression Unit form Standard Form (4 tens 3 ones) × 10 43 ONES 430 Ones 430 (2 hundreds 3 tens) × 10 2 thousand 3 hundred 2 thousand 3 hundred 2300 (7 thousands 8 hundreds) × 10 7 ten thousands 7 ten thousands 8 thousand 78000 (6 thousands 4 tens) ÷ 10 6 hundreds 4 ones 604 (4 ten thousands 3 tens) ÷ 10 4 thousands 3 ones 4003

Question 4.
Explain how you solved 10 × 4 thousands. Use a place value chart to support your explanation.
10 × 4 thousands = 4 ten thousands

Explanation:
When multiplying with 10 the number moves right side on the place value chat.
10 times of 4 thousands is 40 thousand = 4 ten thousands.

Question 5.
Explain how you solved (4 ten thousands 3 tens) ÷ 10. Use a place value chart to support your explanation.
(4 ten thousands 3 tens) ÷ 10
4 thousands 3 ones

Explanation:
when Dividing with 10 the number value moves towards the left side in the place value chart.
4 ten thousands 3 tens ÷ 10 = 4 thousands 3 ones = 4003.

Question 6.
Jacob saved 2 thousand dollar bills, 4 hundred dollar bills, and 6 ten dollar bills to buy a car. The car costs 10 times as much as he has saved. How much does the car cost?
Total money saved by Jacob to buy a car is = 2 thousand 4 hundred 6 ten dollar
The cost of the car is 10 times as much as he saved =
2 thousand 4 hundred 6 ten dollar × 10 = 2 ten thousand 4 thousand 6 hundred
= 24,600 dollars.
The total cost of the car = $24600. Question 7. Last year the apple orchard experienced a drought and did not produce many apples. But this year, the apple orchard produced 45 thousand Granny Smith apples and 9 hundred Red Delicious apples, which is 10 times as many apples as last year. How many apples did the orchard produce last year? Answer: This year Number of apple orchard produced are = 45 thousand Granny smith apples and 9 hundred Red Delicious apples. This year production is 10 times as many apples as last year. Number of apples produced Last year are = this year production ÷ 10 = 45 thousand 9 hundred ÷ 10 = 45 hundred 9 ten = 4590 apples. Last year production by apple orchard are 4590 apples. Question 8. Planet Ruba has a population of 1 million aliens. Planet Zamba has 1 hundred thousand aliens. a. How many more aliens does Planet Ruba have than Planet Zamba? b. Write a sentence to compare the populations for each planet using the words 10 times as many. Answer: Total population of aliens on Planet Ruba = 1 million =1,000,000 = 10 lakhs Total population of aliens on Planet Zamba = 1 hundred thousand = 100,000= 1 lakh a: difference of population of aliens does Planet Ruba have than Planet Zamba = 10,00,000 – 1,00,000 = 9,00,000 = 9 lakhs. 9 lakhs many more aliens does Planet Ruba have than Planet Zamba. b: Aliens population on Planet Ruba is 10 times more than planet Zamba = 100,000 × 10 Aliens population on Planet Zamba is 10 times less than Planet Ruba = 10,00,000 ÷ 10 ### Eureka Math Grade 4 Module 1 Lesson 2 Exit Ticket Answer Key Question 1. Fill in the blank to make a true number sentence. Use standard form. a. (4 ten thousands 6 hundreds) × 10 = ________________________ b. (8 thousands 2 tens) ÷ 10 = _________________________ Answer: a. (4 ten thousands 6 hundreds) × 10 = __4 lakhs 6 thousand = 4,06,000_ b. (8 thousands 2 tens) ÷ 10 = ___8 hundreds 2 ones__= __802__________________ Question 2. The Carson family saved up$39,580 for a new home. The cost of their dream home is 10 times as much as they have saved. How much does their dream home cost?
Total money saved by the Carson family for a new home = $39,580.$39,580 = 3 ten thousand 9 thousand 5 hundred 8 tens
The cost of their dream home is 10 times as much as they saved = $39,580 × 10 =$3,95,800= 3 lakh 9 ten thousand 5 thousand 8 hundred.
The cost of their dream home is $3,95,800= 3 lakh 9 ten thousand 5 thousand 8 hundred. ### Eureka Math Grade 4 Module 1 Lesson 2 Homework Answer Key Question 1. As you did during the lesson, label and represent the product or quotient by drawing disks on the place value chart. a. 10 × 4 thousands = _________ thousands = ______________________________ Answer: b. 4 thousands ÷ 10 = __________ hundreds ÷ 10 = _____________________________ Answer: Question 2. Solve for each expression by writing the solution in unit form and in standard form.  Expression Unit Form Standard Form 10 × 3 tens 5 hundreds × 10 9 ten thousands ÷ 10 10 × 7 thousands Answer:  Expression Unit Form Standard Form 10 × 3 tens 30 tens 300 5 hundreds × 10 50 hundreds or 5 thousands 5,000 9 ten thousands ÷ 10 9 thousands 9,000 10 × 7 thousands 70 thousands or 7 ten thousands 70,000 Question 3. Solve for each expression by writing the solution in unit form and in standard form.  Expression Unit Form Standard Form (2 tens 1 one) × 10 (5 hundreds 5 tens) × 10 (2 thousands 7 tens) ÷ 10 (4 ten thousands 8 hundreds) ÷ 10 Answer:  Expression Unit Form Standard Form (2 tens 1 one) × 10 2 hundreds 1 tens 201 (5 hundreds 5 tens) × 10 5 thousands 5 hundreds 5,500 (2 thousands 7 tens) ÷ 10 2 hundreds 7 ones 207 (4 ten thousands 8 hundreds) ÷ 10 4 thousands 8 tens 4,080 Question 4. a. Emily collected$950 selling Girl Scout cookies all day Saturday. Emily’s troop collected 10 times as much as she did. How much money did Emily’s troop raise?
b. On Saturday, Emily made 10 times as much as on Monday. How much money did Emily collect on Monday?
Total money collected by Emily by selling Scout cookies =$950. But Emily’s troop collects 10 times as much as Emily did = 10 ×$950
Total money raised by Emily’s troop = 10 × $950 =$9,500. = 9 thousand 5 hundred dollars.
Money collected  by Emily on Saturday = $950 On Saturday, Emily made 10 times as much as on Monday On Monday the money collected by Emily =$950 ÷ 10
=$95. Money collected by Emily on Monday is$95.