# McGraw Hill My Math Grade 3 Chapter 5 Answer Key Understand Division

All the solutions provided in McGraw Hill My Math Grade 3 Answer Key PDF Chapter 5 Understand Division will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 3 Answer Key Chapter 5 Understand Division

Essential Question?
What does division mean?

Write two multiplication sentences for each array.

Question 1. _____ _____
2 × 4 = 8
4 × 2 = 8

Explanation:
No of rows = 2
No of columns = 4
The two multiplication sentences are
2 × 4 = 8
4 × 2 = 8

Question 2. _____ _____
3 × 5 = 15
5 × 3 = 15

Explanation:
Given,
No of rows = 3
No of column = 5
The two multiplication sentences are
3 × 5 = 15
5 × 3 = 15

Identify a pattern. Then find the missing numbers.

Question 3.
30, 25, 20, ___, ___, 5 Pattern: _____
15, 10, 5

Explanation:
The pattern that follows are
30 – 25 = 5
25 – 20 = 5
20 – 15 = 5
15 – 10 = 5

Question 4.
12, ___, 8, ____, 4, 2 Pattern: _____
12, 10, 8, 6, 4, 2

Explanation:
The pattern that follows are
12 – 10 = 2
10 – 8 = 2
8 – 6 = 2
6 – 4 = 2
12, 10, 8, 6, 4, 2

Question 5.
55, 45, 35, ____, 15, ____ Pattern: _____
55, 45, 35, 45, 15, 5

Explanation:
The pattern that follows are
5 × 1 = 5
5 × 3 = 15
5 × 5 = 25
5 × 7 = 35
5 × 9 = 45
55, 45, 35, 45, 15, 5

Draw the counters in the circles to make equal groups.

Question 6. 12 ÷ 2 = 6

Explanation:
No of counters = 12
No of groups = 2
12 ÷ 2 = 6 counters in each group. Question 7. 9 ÷ 3 = 3

Explanation:
No of counters = 9
No of groups = 3
9 ÷ 3 = 3 Question 8.
Colton made 15 party invitations. His brother made 9 invitations. Write a subtraction sentence to find how many more invitations Colton made.
15 – 9 = 6 more invitations.

Explanation:
Given,
No of party invitations = 15
His brother made = 9 invitations
The subtraction sentence = 15 – 9 = 6
Hence there are 6 more invitations colton made.

Question 9.
Mrs. Jones has 21 pencils. She gives 2 pencils to Carter and 2 pencils to Mandy. Write a subtraction sentence to find how many pencils she has left.
21 – 4 = 17 pencils left.

Explanation:
Given,
No of pencils = 21
She gave 2 pencils to carter
She gave 2 pencils to Mandy.
Total of 4 pencils were given from 21.
21 – 4 = 17 pencils.
She left with 17 pencils.

My Math Words

Review Vocabulary

array equal groups pattern repeated addition

Making Connections
Use the review vocabulary to describe each example in the graphic organizer. How are the examples similar? How are the examples different?
Given all examples are same. If we solve we get the same answer. But while solving we used different models to find the answers.

Example: My Vocabulary Cards  Ideas for Use

• Group 2 or 3 common words. Add a word that is unrelated to the group. Then work with a friend to name the unrelated word.
• Design a crossword puzzle. Use the definition for each word as the clues.

A number that is being divided.
Circle the dividend in 12 ÷ 4 = . Then write the quotient.
Quotient = 3

Explanation:
Given,
The question is 12 ÷ 4 = 4 × 3 = 12
The answer to this question is 3.
The dividend is 12. The number by which the dividend is being divided.
Write a division sentence in which the divisor is 5. Circle the divisor.
15 ÷ 5 = 3

Explanation:
We need to find the division sentence.
The divisor = 5
let the dividend be 15

Operations that undo each other, like multiplication and division.
Use inverse operations to write a multiplication and division sentence.
5 × 3 = 15
15 ÷ 5 = 3

Explanation:
The inverse operations to write a multiplication and division sentence.
5 × 3 = 15
15 ÷ 5 = 3

The answer to a division problem.
Write and solve a division problem. Circle the quotient.
20 ÷ 5 = 4

Explanation:
Let us solve the divison problem
Let the dividend be 20, divisor be 5
By dividing both of them the answer is 20 ÷ 5 = 4
The quotient is 4. To separate into equal groups, to find the number of groups or the number in each group.
By dividing the snacks each friend will get equal snacks.

Explanation:
Let us take an example to solve this.
No of friends = 20
No of chocolate snacks = 5
By dividing both = 20 ÷ 5 = 4
Therefore each each will get 4 chocolate snacks.

A number sentence using numbers and the ÷ sign.
Write an example of a division sentence. Then write the sentence using words.
25 ÷ 5 = 5
25 is shared into 5 equal groups would give us 5 in each group.

Explanation:
The example of a division sentence is 25 ÷ 5 = 5.
25 is shared into 5 equal groups would give us 5 in each group.

A group of related facts using the same numbers.
Write the numbers in the fact family shown on this card.
The fact family is multiplication or division fact family.

Explanation:
The multiplication fact family is
3 × 9 = 27
9 × 3 = 27
The divison fact family is
27 ÷ 3 = 9
27 ÷ 9 = 3

To divide or “break up.”
Partition can mean “a wall that divides a room into different areas.” How does that relate to the math word?
Divide

Explanation:
The word that relate to the math word is Divide.

My Vocabulary Cards The chart for the vocabulary cards is given in the figure below.

Explanation: Ideas for Use

• Write an example for each card. Be sure your examples are different from what is shown on each card.
• Write the name of each lesson on the front of each blank card. Write a few study tips on the back of each card.

Subtraction of the same number over and over again.
Write a sentence comparing repeated subtraction to repeated addition.
4 + 4 + 4 = 16

Explanation:
A sentence comparing repeated subtraction to repeated addition is 4 + 4 + 4 = 16.

Basic facts using the same numbers.
Why is facts plural in this vocabulary word?
The facts are plural because we can write different facts by using the same numbers.

Explanation:
The different facts by using the same numbers is multiplication fact or division fact and addition and subtraction fact.

My Foldable Dividend = 28, divisor = 7 and Quotient = 4
28 ÷ 7 =4

Explanation: Foldables
Study Organizer  