All the solutions provided in **McGraw Hill My Math Grade 5 Answer Key PDF Chapter 5 Add and Subtract Decimals** will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 5 Answer Key Chapter 5 Add and Subtract Decimals

**Essential Question**

How can I use place value and properties to add and subtract decimals?

Answer:

1. First, line up the decimal points vertically.

2. Fill in any 0’s wherever it is necessary.

3. Add or subtract the numbers as if the given numbers are whole numbers.

4. Place the decimal point in the sum or difference with the numbers being added or subtracted.

**Am I Ready**

**Name the place-value position of each underlined digit.**

Question 1.

52 ______________

Answer:

5 tens.

Explanation:

The place-value position of the underlined digit is 5 tens.

Question 2.

138 ______________

Answer:

8 ones.

Explanation:

The place-value position of the underlined digit is 8 ones.

Question 3.

4.3 ______________

Answer:

3 ones.

Explanation:

The place-value position of the underlined digit is 5 ones.

Question 4.

901 ______________

Answer:

9 Hundred.

Explanation:

The place-value position of the underlined digit is 9 hundreds.

Question 5.

1.216 _______________

Answer:

1 Tens.

Explanation:

The place-value position of the underlined digit is 1 Tens.

Question 6.

2,785 _______________

Answer:

2 Thousands.

Explanation:

The place-value position of the underlined digit is 2 Thousands.

**Round each number to the underlined place.**

Question 7.

19 = ____________

Answer:

1 Tens.

Explanation:

The place-value position of the underlined digit is 1 tens.

Question 8.

681 = ______________

Answer:

8 Thousands.

Explanation:

The place-value position of the underlined digit is 5 Thousands.

Question 9.

735 = _______________

Answer:

7 Thousands.

Explanation:

The place-value position of the underlined digit is 5 ones.

Question 10.

3,705 = _______________

Answer:

3 Thousands

Explanation:

The place-value position of the underlined digit is 3 Thousands.

Question 11.

106,950 = _________________

Answer:

6 Thousands.

Explanation:

The place-value position of the underlined digit is 6 Thousands.

Question 12.

5,750 = ________________

Answer:

7 Hundreds.

Explanation:

The place-value position of the underlined digit is 7 Hundreds.

**Add.**

Question 13.

38 + 16 = ______________

Answer:

54

Explanation:

The addition of the given two numbers is 54.

Question 14.

151 + 218 = ______________

Answer:

369

Explanation:

The addition of the given two numbers is 369.

Question 15.

260 + 398 = _____________

Answer:

658

Explanation:

The addition of the given two numbers is 658.

Question 16.

235 + 68 = ______________

Answer:

303

Explanation:

The addition of the given two numbers is 303.

Question 17.

The Pham family and the Weber family have many pets. How many more pets does the Pham family have than the Weber family?

Answer:

The Pham family has 4 more pets than the Weber family.

Explanation:

Given,

The Pham family has 3 dogs, 1 cat, and 6 fish

Total no of pets Pham family has = 3 + 1 + 6 = 10

The weber family has 2 dogs, 3 gerbils, and 1 turtle

Total no of pets weber family has = 2 + 3 + 1 = 6

10 – 6 = 4

Therefore the Pham family has 4 more pets than the Weber family.

**How Did I Do?**

Shade the boxes to show the problems you answered correctly.

Answer:

**My Math Words**

Review Vocabulary

greater than (>)

less than (<) equal to (=) Making Connections Compare the numbers in each row. Use the review vocabulary to compare the two numbers in each row using >, <, or =.

Describe how you used place value to complete the chart.

Answer:

Given,

The number is 57.2 and 57.02

Now compare the given numbers

Check the place values

2 ones > 0 ones

57.2 > 57.02

Numbers are 12.01 and 12.1

Now compare the numbers

0 ones < 1 ones

Numbers are 12.6 and 12.60

6 ones is equal to 6 ones

6 = 6

12.6 = 12.60

Numbers are 24.56 and 24.5

Now compare the numbers

6 ones > 0 ones

24.56 > 24.5

Given Numbers are 6.99 and 6.89

9 > 8

6.99 > 6.89

Explanation:

**My Vocabulary Cards**

Ideas for Use

- Write a tally mark on each card every time you read the word in this chapter or use it in your writing. Challenge yourself to use at least 10 tally marks for each card.
- Use the blank cards to write your own vocabulary cards.

The order in which numbers are added does not change the sum.

Commutative means “something that involves substitution.” How does this definition relate to the Commutative Property?

Answer:

Commutative Property of addition.

Explanation:

The related to the Commutative Property is called Commutative Property of addition.

The way in which numbers are grouped does not change the sum.

Compare the example on this card with the example on the Commutative Property card. What differences do you notice?

Answer:

It is called associative property of addition.

Explanation:

The way in which numbers are grouped does not change the sum is called associative property of addition. The commutative property means that a+b is the same as b+a. The associative property means that (a+b)+c is the same as (a+c)+b.

Operations that undo each other.

What are the inverse operations for addition and division?

Answer:

Inverse operations are opposite operations.

The division is the inverse of multiplication and subtraction is the inverse of addition and

The sum of any number and 0 equals the number.

Explain how one of the three properties in this chapter can help you add mentally.

Answer:

Identity property

**My Foldable**

Follow the steps on the back to make your Foldable.

Answer:

Explanation:

Given,

The numbers are 1.29 and 1.55.

Now add both numbers = 1.29 + 1.55 = 2.84

Estimate the numbers.

1.29 = 1 and 1.55 = 2

add = 1 + 2 = 3

Check for Reasonableness

2.84 ≈ 3