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.

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.
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.
parentheses
Explanation :
parentheses tell you which operations to group in a number sentence

Question 3.
_____ is a way of doing math in my head.
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) _____
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 ____
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.
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.
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 ____
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 ____
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 = ____
_________
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 = ____
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 = ____
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
_________
1 more than 375 is 376
Explanation:
1 + 375 = 376
Question 14.
1.000 more than 2,184
_________
1.000 more than 2184 is 2185
Explanation:
1.000 + 2184 = 2185

Make a ten or a hundred to add mentally.

Question 15. ____ + ____ = _____ 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. ____ + ____ = _____ 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
____ + ____ = _____
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
____ + ____ = _____
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

Question 19. Estimate:
____ + ____ = _____ 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
____ + ____ = _____ 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?
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?
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?
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?
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 