We included HMH Into Math Grade 3 Answer Key PDF Module 9 Lesson 3 Use Properties to Add to make students experts in learning maths.

I Can use the Commutative and Associative Properties of Addition to find the sum of more than two addends.

Addy does jumping jacks each day. She keeps a log of the number of jumping jacks that she completes each day this week.

Find the total number of jumping jacks for any three days.
89

Explanation:
The number of jumping jacks for any three days are
Monday   18
Tuesday   39
Wednesday  32
Therefore the total number of jumping jacks for any three days is 18 + 39 + 32 = 89.

Turn and Talk Explain why you chose the numbers you did. How did you find the sum?
The sum of the three Jumping jacks is 89.

Explanation:
I have chosen the numbers randomly and by adding the three jumping jacks that are 18 + 39 + 32 = 89.

Build Understanding

1. Matt’s bowling score for three games is shown. How many total points does Matt score?

249.

Explanation:
The total points does Matt score is 53 + 109 + 87 = 249

Show one way to order the numbers and find the sum.

A. What is another way to order the numbers and find the sum?
_______________________
Connect to Vocabulary
You have learned that the Commutative Property of Addition states that you can add two or more numbers in any order and get the same sum. The Associative Property of Addition states that you can group addends in different ways and still get the same sum.

Example:
4 + (9 + 6) = 19
(4 + 9) + 6 = 19

B. Use parentheses to show how you group the addends in the equation.
_______________________

C. Write another equation to show a different way to group the addends.

D. What do you notice about the sums?
_______________________

Turn and Talk Why can changing the way the addends are grouped make the numbers easier to add?

Step It Out

2. The table shows the number of minutes per week that Kenzie runs. How many minutes does Kenzie run in 3 weeks?

199.

Explanation:
Kenzie ran 199 minutes per week for 3 weeks.

A. Look for a way to group the addends to make them easy to add. Write the order of the addends. Use parentheses to show how you grouped the addends.
_________________

_________________
_________________
D. How many minutes does Kenzie run? _________________
199 minutes.

Explanation:
Kenzie run 199 minutes.

Check Understanding Math Board

Question 1.
To train for a race, Ani walks for 62 miles, bikes for 119 miles, and swims for 36 miles. How many miles does Ani walk, bike, and swim? _________
217 miles.

Explanation:
Ani walks for 62 miles
Bikes for 119 miles
The total miles does Ani walk, bike, and swim are 119 + 62 + 36 = 217 miles.

Question 2.
316

Explanation:
The addition properties to add 28 + 246 + 42 = 316.

Question 3.
Use Structure Lee does 74 sit-ups on Monday, 67 on Tuesday, and 25 on Wednesday. How many sit-ups does Lee do in 3 days? ____

Question 4.
36 + 47 + 24 = ___
107.

Explanation:
The sum of the given numbers 36 + 47 + 24 = 107.

Question 5.
95 + 50 + 15 = ___
160

Explanation:
The sum of the given numbers 95 + 50 + 15 is 160.

Question 6.
57 + 36 + 224 = ___
317

Explanation:
The sum of the given numbers  57 + 36 + 224 is 317.

Question 7.
237 + 303 + 49 = ___
589.

Explanation:
The sum of the given numbers  237 + 303 + 49 is 589.

Question 8.
Reason Keisha jumps rope in gym class. The table shows the number of jumps for a week. Did Keisha jump rope more times on Monday, Tuesday, and Wednesday or on Thursday, Friday, and Saturday? Explain your thinking.