All the solutions provided in **McGraw Hill My Math Grade 3 Answer Key PDF Chapter 2 Review **will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 3 Chapter 2 Review Answer Key

**Vocabulary Check**

**Choose the correct word(s) below to complete each sentence.**

Associative Property bar diagram Commutative Property

estimate Identity Property mental math

parentheses pattern reasonable

regroup unknown

Question 1.

The _____ of Addition states that you can change the order of the addends and still get the same sum.

Answer:

Commutative property

Explanation :

Commutative property of Addition states that you can change the order of the addends and still get the same sum.

Question 2.

_____ tell you which operations to group in a number sentence.

Answer:

parentheses

Explanation :

parentheses tell you which operations to group in a number sentence

Question 3.

_____ is a way of doing math in my head.

Answer:

mental math

Explanation:

Mental math is a way of doing math in my head.

Question 4.

A number close to its actual value is a(n) _____

Answer:

estimate

Explanation:

A number close to its actual value is an estimate

Question 5.

To use place value to exchange equal amounts when renaming a number is to ____

Answer:

regroup

Explanation:

To use place value to exchange equal amounts when renaming a number is to regroup

Question 6.

A ____ is a set of numbers that follow a certain order.

Answer:

pattern

Explanation:

A set of numbers that follow a certain order is a pattern

Question 7.

The ____ of Addition states when you add zero to any number, the sum is that number.

Answer:

Identity

Explanation:

The Identity Property of Addition states that the sum of any number and zero is that number.

**Concept Check**

Question 8.

When an answer makes sense, it is ____

Answer:

reasonable

Explanation:

When an answer makes sense, it is reasonable

Question 9.

The missing number or what you are solving for in a problem is the ____

Answer:

unknown

Explanation:

The missing number or what you are solving for in a problem is the unknown

**Concept Check**

**Find each sum. Identify the property of addition. Write Commutative, Associative, or Identity.**

Question 10.

8 + 0 = ____

_________

Answer:

Identity (8+0=8)

Explanation:

The Identity Property of Addition states that the sum of any number and zero is that number.

Question 11.

2 + (4 + 3) = ___

(2 + 4) + 3 = ____

Answer:

Associative

2 + (4 + 3) = 9

(2 + 4) + 3 = 9

Explanation:

The Associative Property of Addition states that the way addends are grouped does not change the sum.

Question 12.

5 + 7 = ____

7 + 5 = ____

Answer:

5 + 7 =12

7 + 5 =12

Explanation :

Commutative property of Addition states that you can change the order of the addends and still get the same sum.

**Write the number.**

Question 13.

1 more than 375

_________

Answer:

1 more than 375 is 376

Explanation:

1 + 375 = 376

Question 14.

1.000 more than 2,184

_________

Answer:

1.000 more than 2184 is 2185

Explanation:

1.000 + 2184 = 2185

**Make a ten or a hundred to add mentally.**

Question 15.

____ + ____ = _____

Answer:

200 + 130 = 330

Explanation:

Tens and ones are taken apart and added separately

By expanded form we can add the numbers by rounding them to nearest tens

Question 16.

____ + ____ = _____

Answer:

1273 + 3600 = 4873

Explanation:

Tens and ones are taken apart and added separately

By expanded form we can add the numbers by rounding them to nearest tens

**Estimate. Round each addend to the indicated place value.**

Question 17.

725 + 229; tens

____ + ____ = _____

Answer:

725 + 229 = 954

720 + 234 = 954

Explanation:

Tens and ones are taken apart and added separately

By expanded form we can add the numbers by rounding them to nearest tens

Question 18.

8,291 + 1,101; hundreds

____ + ____ = _____

Answer:

8291 + 1101 = 9392

8290 + 1102 = 9392

Explanation:

Tens and ones are taken apart and added separately

By expanded form we can add the numbers by rounding them to nearest tens

**Add. Check for reasonableness.**

Question 19.

Estimate:

____ + ____ = _____

Answer:

Explanation:

640 + 280 = 920

Tens and ones are taken apart and added separately

By expanded form we can add the numbers by rounding them to nearest tens

Question 20.

Estimate

____ + ____ = _____

Answer:

Explanation:

2200 + 5090 = 7290

Tens and ones are taken apart and added separately

By expanded form we can add the numbers by rounding them to nearest tens

**Problem Solving**

**Write a number sentence with a symbol for the unknown. Then solve.**

Question 21.

A horse weighs 1,723 pounds. A smaller horse weighs 902 pounds. How much do both horses weigh together?

Answer:

both horses weigh together 2625 pounds.

Explanation :

A horse weighs 1,723 pounds

A smaller horse weighs 902 pounds

1723 + 902 = 2625

sum of 1723 and 902 is 2625

Question 22.

A golf ball has 336 dimples. How many dimples would two golf balls have altogether?

Answer:

two golf balls will have 672

Explanation :

A golf ball has 336 dimples so two golf balls will have 672

336 + 336 = 672

sum of 336 and 336 is 672

Question 23.

Samuel walked one mile before lunch and one mile after lunch. The length of a mile is 1,760 yards. In yards, what is the total distance Samuel walked?

Answer:

total distance Samuel walked is 3520 yards

Explanation :

The length of a mile is 1,760 yards.

Samuel walked two miles in total.

sum of 1760 + 1760 = 3520

Question 24.

There are two different mountains in the state of Washington that get record snowfall. One winter season, Mount Ranier received 1,224 inches of snow. Mount Baker received 1,140 inches of snow. What is the total snowfall of these two mountains?

Answer:

total snowfall of these two mountains is 2364

Explanation :

Mount Ranier received 1,224 inches of snow.

Mount Baker received 1,140 inches of snow.

1224 + 1140 = 2364

so the total snowfall of these two mountains is 2364

**Test Practice**

Question 25.

Dwight drove 792 miles from Pensacola, Florida, to Key West, Florida, and then back again. What is the distance he traveled to the nearest hundred miles?

A. 800 miles

B. 1,580 miles

C. 1,584 miles

D. 1,600 miles

Answer:

A

Explanation :

the nearest hundred miles of 792 is 800

**Reflect**

Use what you learned about addition to complete the graphic organizer.

Now reflect on the ESSENTIAL QUESTION? Write your answer below.