Into Math Grade 4 Module 2 Lesson 3 Answer Key Use Addition and Subtraction to Solve Comparison Problems

We included HMH Into Math Grade 4 Answer Key PDF Module 2 Lesson 3 Use Addition and Subtraction to Solve Comparison Problems to make students experts in learning maths.

HMH Into Math Grade 4 Module 2 Lesson 3 Answer Key Use Addition and Subtraction to Solve Comparison Problems

I Can draw a bar model for a comparison problem. I can write an equation and use addition or subtraction to find the unknown number in the bar model.

Spark Your Learning

Mr. Jones set up a savings account to save for a new car. How much more money does he have to save to cover the cost of the car shown?
HMH Into Math Grade 4 Module 2 Lesson 3 Answer Key Use Addition and Subtraction to Solve Comparison Problems 1
Draw a visual representation of this problem. Then solve the problem.
HMH Into Math Grade 4 Module 2 Lesson 3 Answer Key Use Addition and Subtraction to Solve Comparison Problems 2

Turn and Talk How did you decide which operation to use to solve the problem?
Explanation:

To know the savings we have to do subtraction.

Build Understanding

1. A large shopping mall has 10,972 employees for most of the year. During the busy season, the mall has 2,135 more employees. How many employees does the mall have during the busy season?
HMH Into Math Grade 4 Module 2 Lesson 3 Answer Key Use Addition and Subtraction to Solve Comparison Problems 3
A. Draw a visual representation of this problem.
B. Write an equation to model the problem. Use n for the unknown number. Then solve.
HMH Into Math Grade 4 Module 2 Lesson 3 Answer Key Use Addition and Subtraction to Solve Comparison Problems 4
There are ____ employees during the busy season.
Explanation:

There are 13,062 employees during the busy season.

Turn and Talk Compare the equation you wrote to solve the problem with the equations written by your classmates. How are the equations the same? How are they different?
let the total number of employees = n
10,972 employees off the season
2,135 more employees in the season
n = 10972 + 2135
n = 13,062

Step It Out

2. On Saturday and Sunday, there were a total of 16,096 mall employees working. On Saturday, there were 8,946 mall employees working. How many fewer mall employees were working on Sunday than on Saturday?
HMH Into Math Grade 4 Module 2 Lesson 3 Answer Key Use Addition and Subtraction to Solve Comparison Problems 5
Explanation:

A. Write an equation modeling the number of mall employees, s, working Sunday. Find s.
_____________________________
Explanation:
let s be the working on the Sunday
Employees on Saturday and Sunday is 16,096
Employees on Saturday is 8,946
s = 16096 – 8946
s = 7150
B. Write an equation modeling the difference, w, in number of mall employees working Sunday and the number working on Saturday. Then find w.
_____________________________
Explanation:
Employees on Saturday and Sunday is 16,096
w = 8,946 + 7150
w = 16096
C. How can you tell if your answer is reasonable? Explain.
_____________________________
Explanation:
The w =s we got through the equations
so my answer is reasonable.

Check Understanding Math Board

Question 1.
A park had 4,307 visitors on Thursday and 1,614 more visitors on Friday than on Thursday. How many visitors did the park have on Friday?
Answer:
5921 visitors
Explanation:
4,307 visitors on Thursday
1,614 more visitors on Friday than on Thursday
4307 + 1614 = 5921
5921 visitors that the park have on Friday

Question 2.
A theater sold 2,149 tickets on opening weekend. By the end of the second weekend, they had sold a total of 5,036 weekend tickets. How many fewer tickets were sold on the opening weekend than on the second weekend?
Answer:

Explanation:
2,149 tickets on first weekend.
5,036  tickets on second weekend
5036 – 2149 = 2887

On Your Own

Question 3.
Model with Mathematics The distance from Miami, Florida, to Minneapolis, Minnesota, is 1,793 miles. The distance from Miami to Seattle, Washington, is 3,336 miles. How many more miles is it from Miami to Seattle than it is from Miami to Minneapolis? Write an equation and solve the problem.
HMH Into Math Grade 4 Module 2 Lesson 3 Answer Key Use Addition and Subtraction to Solve Comparison Problems 6
Answer:

Explanation:
Miami, Florida, to Minneapolis, Minnesota, is 1,793 miles
Miami to Seattle, Washington, is 3,336 miles
Let n be the more miles is it from Miami to Seattle than it is from Miami to Minneapolis
3336 – 1793 = n
n = 1543

Question 4.
Mel’s Cafe is open 7 hours a day for 8 days. Mary’s Cafe is open 8 hours a day for 6 days. Which cafe is open fewer hours? How many fewer hours? Show your work.
Answer:
8 fewer hours Mary’s Cafe is open
Explanation:
7 x 8 = 56 hours is Mel’s Cafe
8 x 6 = 48 hours is Mary’s Cafe
56 – 48  = 8
8 fewer hours Mary’s Cafe is open

Question 5.
Open Ended A male African elephant weighs 12,218 pounds. A female African elephant weighs 7,376 pounds.
Write a comparison problem using this information. Draw a visual model for your problem. Write an equation and then solve the problem.
__________________________________
__________________________________
Answer:

Explanation:
male African elephant weighs 12,218 pounds
female African elephant weighs 7,376 pounds.
let n be the difference of the weight.
12218 – 7316 = n
n = 4842

I’m in a Learning Mindset!

How could I solve Problem 4 a different way?
__________________________________
Explanation:
Mel’s Cafe is open 7 hours a day for 8 days.
7 x 8 = 56
Mary’s Cafe is open 8 hours a day for 6 days.
8 x 6 = 48
so, 56 – 48 = 8

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