All the solutions provided in McGraw Hill My Math Grade 3 Answer Key PDF Chapter 2 Addition will give you a clear idea of the concepts.
McGraw-Hill My Math Grade 3 Answer Key Chapter 2 Addition
Essential Question?
How can place value help me add larger numbers?
Explanation:
With the help of place values we can add directly
tens to tens, hundreds to hundreds
We can estimate the answer very fast.
Am I Ready?
Add.
Question 1.
Answer:
Explanation:
The sum of 5 and 4 is 9
5 + 4 = 9
Question 2.
Answer:
Explanation:
The sum of 6 and 7 is 13
6 + 7 = 13
Question 3.
Answer:
Explanation:
The sum of 9 and 6 is 15
9 + 6 = 15
Question 4.
Answer:
Explanation:
The sum of 4 and 8 is 12
4 + 8 = 12
Question 5.
9 + 2 = ____
Answer:
Explanation:
The sum of 9 and 2 is 11
9 + 2 = 11
Question 6.
4 + 6 = ____
Answer:
Explanation:
The sum of 4 and 6 = 10
4 + 6 = 10
Question 7.
9 + 8 = ____
Answer:
Explanation:
The sum of 9 and 8 is 17
9 + 8 = 17
Question 8.
7 + 7 = ____
Answer:
Explanation:
The sum of 7 and 7 is 14
7 + 7 = 14
Question 9.
Answer:
Explanation:
The sum of 24 and 11 is 35.
24 + 11 = 35
Question 10.
Answer:
Explanation:
The sum of 65 and 12 is 77
65 + 12 = 77
Question 11.
What number is 10 more than 66?
_________
Answer:
10 more than 66 is 77. Addition is replaced by more than.
Explanation:
The sum of 10 and 66 is 77
10 + 66 = 77
Question 12.
What number is 100 more than 800?
____________
Answer:
100 more than 800 is 900. Addition is replaced by more than.
Explanation:
The sum of 100 and 800 is 900
100 + 800 = 900
Round to the nearest ten.
Question 13.
72 ____
Answer:
The nearest round of 72 is 70.
Explanation:
By subtracting 2 from 72 makes 70
72 – 2 = 70
Question 14.
17 ____
Answer:
The nearest round of 17 is 20.
Explanation:
By adding 3 to 17 makes 20
17 + 3 = 20
Question 15.
63 _________
Answer:
The nearest round of 63 is 60.
Explanation:
Subtracting 3 from 63 makes 60
63 – 3= 60
Question 16.
88 ____
Answer:
The nearest round of 88 is 90.
Explanation:
Adding 2 to 88 makes 90
88 + 2 = 90
Round to the nearest hundred.
Question 17.
470 ____
Answer:
The nearest round of 470 is 500.
Explanation:
Adding 30 to 470 makes 500
470 + 30 = 500
Question 18.
771 ____
Answer:
The nearest round of 771 is 800.
Explanation:
Adding 29 to 771 makes 800
771 + 29 = 800
Question 19.
301 ____
Answer:
The nearest round of 301 is 300.
Explanation:
Subtracting 1 from 301 makes 300
301 – 1 = 300
Question 20.
149 ____
Answer:
The nearest round of 149 is 100.
Explanation:
Subtracting 49 from 149 makes 100
149 – 49 = 100
My Math Words
Review Vocabulary
addend addition sentence sum
Making Connections
Use the review vocabulary to complete the graphic organizer. You will use numbers in some of your answers.
Answer:
My Vocabulary Cards
Ideas for Use
- During this school year, create a separate stack of cards for key math verbs, such as regroup. These verbs will help you in your problem solving.
- Use a blank card to write this chapter’s essential question. Use the back of the card to write or draw examples that help you answer the question.
A bar diagram is used to illustrate number relationships.
The property which states that the grouping of addends does not change the sum.
Jimena made $1,595 last year and $1,876 this year. Draw a bar diagram to show this problem.
A number close to an exact value.
Describe when you might need an estimate.
Ordering or grouping numbers so they are easier to add in your head.
When might it be important to use mental math at a store?
A set of numbers that follows a certain order.
Write your own pattern using numbers.
The property which states that the grouping of addends does not change the sum.
Write your own example to show this property.
The order in which two numbers are added does not change the sum.
Complete the number sentence to show the Commutative Property of Addition.
11 + 7 = _____
Explanation :
11 + 7 = 7 + 11
If you add zero to a number, the sum is the same as the given number.
Replace the suffix -ity in identity with a new suffix. Use it in a sentence.
Symbols that are used to group numbers. They show how to group operations in a number sentence.
Use a dictionary to find the singular form of parentheses.
My Vocabulary Cards
Answer:
Ideas for Use
- During this school year, create a separate stack of cards for key math verbs, such as regroup. These verbs will help you in your problem solving.
- Use a blank card to write this chapter’s essential question. Use the back of the card to write or draw examples that help you answer the question.
To use place value to exchange equal amounts when renaming a number.
What is the prefix in regroup? What does it mean?
Within the bounds of making sense.
The prefix un- can mean “not.” What does the word unreasonable mean?
A missing number, or the number to be solved for.
Write an example of an unknown at the beginning a number sentence.
Answer:
My Foldable
Follow the steps on the back to make your Foldable.
Foldables
Study Organizer
