# McGraw Hill My Math Grade 4 Chapter 3 Answer Key Understand Multiplication and Division

All the solutions provided in McGraw Hill My Math Grade 4 Answer Key PDF Chapter 3 Understand Multiplication and Division will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 4 Answer Key Chapter 3 Understand Multiplication and Division

Essential Question
How are multiplication and division related?

Complete each number sentence.

Question 1.
4 + 4 + 4 = ____
Given that,
The number is 4.
The number 4 repeated 3 times.
The addition sentence is 4 + 4 + 4 = 12.
The multiplication sentence is 4 x 3 = 12.

Question 2.
6 + 6 + ___ + 6 = 24
we know that 24 ÷ 4 = 6.
So, the missing number is 6.
6 + 6 + 6 + 6 = 24.

Question 3.
7 + 7 + 7 = 3 × ___
Given that,
The number is 7.
The number 7 is repeated 3 times.
The addition sentence is 7 + 7 + 7 = 21.
The multiplication sentence is 7 x 3 = 21.

Question 4.
9 + 9 + 9 + 9 = ___ × 9
Given that,
The number is 9.
The number 9 repeated 4 times.
The addition sentence is 9 + 9 + 9 + 9  = 36.
The multiplication sentence is 4 x 9 = 36.

Question 5.
Write the multiplication fact modeled by the array to the right. Given that,
The number of rows are 2.
The number of columns are 4.
Therefore the multiplication fact is 2 x 4.
Multiplication of 2 with 4 then you get 8.
2 x 4 = 8.

Circle equal groups of 3 in each array.

Question 6. Given that,
The total number of stars in a row is 3.
The total number of stars in a column is 4.
The total number of stars are 3 x 4 = 21.
So, 21 ÷ 3 = 4.
Therefore there are 4 groups of stars and 3 in each group. Question 7. Given that,
The total number of moons in a row is 4.
The total number of moons in a column is 6.
The total number of moons are 4 x 6 = 24.
So, 24 ÷ 3 = 8.
Therefore there are 8 groups and each group has 3 moons. Complete each number pattern.

Question 8.
2, 4, 6, ___,10, ___, 14
For missing numbers use the 2 table.
2 x 1 = 2.
2 x 2 = 4.
2 x 3 = 6.
2 x 4 = 8.
2 x 5 = 10.
2 x 6 = 12.
2 x 7 = 14.
Therefore the complete patten is 2, 4, 6, 8, 10, 12, 14.

Question 9.
4,8, 12, ____, 20, 24, ____
For missing numbers use the 4 table.
4 x 1 = 4.
4 x 2 = 8.
4 x 3 = 12.
4 x 4 = 16.
4 x 5 = 20.
4 x 6 = 24.
Therefore the complete patten is 4, 8, 12, 16, 20, 24.

Question 10.
5, ___, 15, 20, ____, 30, ____
For missing numbers use the 5 table.
5 x 1 = 5.
5 x 2 = 10.
5 x 3 = 15.
5 x 4 = 20.
5 x 5 = 25.
5 x 6 = 30.
5 x 7 = 35.
Therefore the complete patten is 5, 10, 15, 20, 25, 30, 35.

Question 11.
___, 18, 27, ____, 45, 54, ____
For missing numbers use the 9 table.
9 x 1 = 9.
9 x 2 = 18.
9 x 3 = 27.
9 x 4 = 36.
9 x 5 = 45.
9 x 6 = 54.
Therefore the complete patten is 9, 18, 27, 36, 45, 54.

My Math Words

Review Vocabulary

divide multiply

Making Connections
Use the review vocabulary to tell which operation(s) to use in each búbble. Solve the word problems.  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 definitions for the words as the clues

The order in which two numbers are multiplied does not change the product.
How is this property different from the Associative Property of Multiplication?

A number that is being divided.
Write the words from this set of cards that are related to dividend.

A group of related facts using the same numbers.
How can you remember that a fact family uses the same 3 numbers?

When any number is multiplied by 1, the product is that number.
Look in the dictionary for a meaning of identity. Write a sentence using that meaning.

The grouping of the factors does not change the product.
How is this property like the Associative Property of Addition?

To break apart a number.
Decompose is a multiple-meaning word. Use another meaning of decompose in a sentence.

The number by which the dividend is being divided.
The suffix -or means “a thing that does the action” Write how divisor does the action in division.

A number that divides a whole number evenly. Also, a number that is multiplied by another number.

My Vocabulary Cards  Ideas for Use

• Write a tally mark on each card every time you read or write the word. Challenge yourself to use at least 3 tally marks for each card.
• Use the blank cards to write your own vocabulary cards.

The answer to a multiplication problem.
Product is a multiple-meaning word. Use another meaning of product in a sentence.

Subtraction of the same subtrahend over and over again.
If repeated addition is a way of doing multiplication, what is repeated subtraction?

A multiple of a number is the product of that number and a whole number.
Write a clue to help you remember that multiples are used in multiplication.

The answer to a division problem.
Write a division equation whose quotient is 4.

When any number is multiplied by 0, the product is 0.   