All the solutions provided in McGraw Hill My Math Grade 3 Answer Key PDF Chapter 4 Review will give you a clear idea of the concepts.
McGraw-Hill My Math Grade 3 Chapter 4 Review Answer Key
Vocabulary Check
Use the word bank to complete each sentence.
array combination Commutative Property
equal groups factor multiplication
multiplication sentence multiply product
tree diagram
Question 1.
An arrangement of objects into rows of equal length and columns of equal length is a(n) ___.
Answer:
array
Explanation:
An arrangement of objects into rows of equal length and columns of equal length is an array.
Question 2.
The answer to a multiplication problem is the ____.
Answer:
product
Explanation:
The answer to a multiplication problem is the product.
Question 3.
_____ is the operation of two numbers that can be thought of as repeated addition.
Answer:
multiplication
Explanation:
Multiplication is the operation of two numbers that can be thought of as repeated addition.
Question 4.
A number multiplied by another number is a ____
Answer:
factor
Explanation:
A number multiplied by another number is a factor.
Question 5.
You can put equal groups together to ____.
Answer:
multiply
Explanation:
You can put equal groups together to multiply.
Question 6.
The ____ says the order in which numbers are multiplied does not change the product.
Answer:
Commutative Property of Multiplication
Explanation:
The Commutative Property of Multiplication says the order in which numbers are multiplied does not change the product.
Question 7.
A ____ uses “branches” to show all possible combinations.
Answer:
Tree diagram
Explanation:
A Tree diagram uses “branches” to show all possible combinations.
Question 8.
When you make a ___ of items, you make a new set that has one item from each group.
Answer:
combination
Explanation:
When you make a combination of items, you make a new set that has one item from each group.
Question 9.
When you have ___, you have the same number of objects in each group.
Answer:
equal groups
Explanation:
When you have equal groups, you have the same number of objects in each group.
Concept Check
Write an addition and a multiplication sentence to show equal rows.
Question 10.
____ + ___ + ____ = ____
____ × ___ = ____
Answer:
3 + 3 + 3 = 9
3 x 3 = 9
Explanation:
The addition sentence is 3 + 3 + 3 = 9
The multiplication sentence is 3 x 3 = 9.
Question 11.
____ + ___ = ____
____ × ___ = ____
Answer:
5 + 5 = 10
2 x 5 = 10
Explanation:
The addition sentence is 5 + 5 = 10
The multiplication sentence is 2 x 5 = 10.
Write two multiplication sentences for each array.
Question 12.
____ x ___ = ____
____ × ___ = ____
Answer:
3 x 2 = 6
3 x 2 = 6
Explanation:
There are 3 rows in the array
There are 2 in each row
So, 3 rows of 2 is the array
3 x 2 = 6
If we rotate the array the sentence will be 2 x 3 = 6
The multiplication sentences are 3 x 2 = 6 and 2 x 3 = 6.
Question 13.
____ × ___ = ____
____ × ___ = ____
Answer:
5 x 3 = 15
3 x 5 = 15
Explanation:
There are 5 rows in the array
There are 3 in each row
So, 5 rows of 3 is the array
5 x 3 = 15
If we rotate the array the sentence will be 3 x 5 = 15
The multiplication sentences are 5 x 3 = 15 and 3 x 5 = 15.
Question 14.
Find the possible combinations of one Yogurt yogurt and one topping. Complete the tree diagram. Write a multiplication sentence to check.
____ × ___ = ____ combinations
Answer:
Explanation:
There are 3 yogurts and 2 toppings for preparing sundaes
So, 3 x 2 = 6
There will be 6 combinations of sundaes
I drew Tree – diagram to show the combinations
3 x 2 = 6 is the multiplication sentence.
Problem Solving
Question 15.
There are 3 rows of 4 muffins. How many muffins altogether? Write two multiplication sentences.
____ × ___ = ____
____ × ___ = ____
Answer:
3 x 4 = 12
4 x 3 = 12
Explanation:
There are 3 rows of 4 muffins
3 groups of 4
The multiplication sentence that show the number of muffins is 3 x 4 = 12
The another sentence will be the change in the order of the factors
The other multiplication sentence is 4 x 3 = 12
Therefore, 3 x 4 = 12 and 4 x 3 = 12 are the two multiplication sentences.
Question 16.
Toya finishes reading a book every 3 days. How many days does it take her to read 7 books? Complete the table to solve.
So, it takes her ____ days to read 7 books.
Answer:
Explanation:
Toya finishes reading a book every 3 days
We need to find the number of days she need to read 7 books
I completed the table using multiplication
The multiplication sentence is 3 x 7 = 21
So, it takes Toya 21 days to read 7 books.
Test Practice
Question 17.
Timmy downloaded 5 songs each day for five days. How many songs did he download during the 5 days altogether?
A. 5 songs
B. 10 songs
C. 25 songs
D. 35 songs
Answer:
C. 25 songs
Explanation:
Timmy downloaded 5 songs each day for five days
Use repeated addition
5 groups of 5
5 + 5 + 5 + 5 + 5 = 25
So, Timmy downloaded 25 songs during the 5 days altogether.
Reflect
Use what you learned about multiplication to complete the graphic organizer.
Now reflect on the ESSENTIAL QUESTION? Write your answer below.
Answer:
Explanation:
I reflected and completed the given graphic organiser.