Students can use the Spectrum Math Grade 3 Answer Key Chapter 4 Posttest as a quick guide to resolve any of their doubts.
Spectrum Math Grade 3 Chapter 4 Posttest Answers Key
Multiply.
Question 1.
a.
Answer: The product value is 5.
Explanation: Given the values are 1, 5.
Now, we will find the product value of the given value.
So, the values are 1, 5
i.e., 1x 5
Therefore, the product is 5.
b.
Answer: The product value is 81.
Explanation: Given the values are 9, 9.
Now, we will find the product value of the given value.
So, the values are 9, 9
i.e., 9 x 9
Therefore, the product value is 81.
c.
Answer: The product value is 6.
Explanation: Given the values are 3, 2.
Now, we will find the product value of the given value.
So, the values are 3, 2
i.e., 3 x 2
Hence, the product value is 6.
d.
Answer: The product value is 20.
Explanation: Given the values are 5, 4.
Now, we will find the product value of the given value.
So, the values are 5, 4
i.e., 5 x 4
Therefore, the product value is 20.
e.
Answer: The product value is 18.
Explanation: Given the values are 6, 3.
Now, we will find the product value.
So, the values are 6, 3
i.e., 6 x 3
Therefore, the product value is 18.
f.
Answer: The product value is 0.
Explanation: Given the values are 8, 0.
Now, we will find the product value.
So, the values are 8, 0.
i.e., 8 x 0 = 0.
Therefore, the product is 0. Anything is multiplied by zero, to get the value 0.
Question 2.
a.
Answer: The product value is 63.
Explanation: Given the values are 9, 7.
Now, we will find the product value of the given value.
So, the values are 9, 7
i.e., 9 x 7
Thus, the product value is 63.
b.
Answer: The product value is 10.
Explanation: Given the values are 5, 2.
Now, we will find the product value of the given value.
So, the values are 5, 2
i.e., 5 x 2
Therefore, the product value is 10.
c.
Answer: The product value is 6.
Explanation: Given the values are 6, 1.
Now, we will find the product value of the given value.
So, the values are 6, 1
i.e., 6 x 1
Thus, the product value is 6.
d.
Answer: The product value is 16.
Explanation: Given the values are 8, 2.
Now, we will find the product value of the given value.
So, the values are 8, 2
i.e., 8 x 2
Therefore, the product value is 16.
e.
Answer: The product value is 35.
Explanation: Given the values are 5, 7.
Now, we will find the product value of the given value.
So, the values are 5, 7
i.e., 5 x 7
Thus, the product value is 35.
f.
Answer: The product value is 12.
Explanation: Given the values are 3, 4.
Now, we will find the product value.
So, the values are 3, 4
i.e., 3 x 4
Therefore, the product value is 12.
Question 3.
a.
Answer: The final product value is 30.
Explanation: Given the values are 6, 5.
Now, we will find the product value of the given value.
So, the values are 6, 5
i.e., 6 x 5
Therefore, the product value is 30.
b.
Answer: The product value is 24.
Explanation: Given the values are 8, 3.
Now, we will find the product value of the given value.
So, the values are 8, 3
i.e., 8 x 3
Therefore, the product value is 24.
c.
Answer: The final product value is 12.
Explanation: Given the values are 4, 3.
Now, we will find the product value of the given value.
So, the values are 4, 3
i.e., 4 x 3
Hence, we get a product value is 12.
d.
Answer: The product value is 0.
Explanation: Given the values are 0, 8.
Now, we will find the product value.
So, the values are 0, 8
i.e., 0 x 8
Therefore, the product value is 0.
e.
Answer: The product value is 12.
Explanation: Given the values are 6, 2.
Now, we will find the product value of the given value.
So, the values are 6, 2
i.e., 6 x 2
Therefore, the product value is 12.
f.
Answer: The product value is 28.
Explanation: Given the values are 4, 7.
Now, we need to find the product value of the given value.
So, the values are 4, 7
i.e., 4 x 7
Therefore, the product value is 28.
Question 4.
a.
Answer: The product value is 20.
Explanation: Given the values are 10, 2.
Now, we will find the product value of the given value.
So, the values are 10, 2
i.e., 10 x 2
Therefore, the product value is 20.
b.
Answer: The product value is 80.
Explanation: Given the values are 20, 4.
Now, we will find the product value of the given value.
So, the values are 20, 4
i.e., 20 x 4
Therefore, the product value is 80.
c.
Answer: The product value is 50.
Explanation: Given the values are 10, 5.
Now, we will find the product value of the given value.
So, the values are 10, 5
i.e., 10 x 5
Therefore, the final product value is 50.
d.
Answer: The product value is 40.
Explanation: Given the values are 40, 1.
Now, we will find the product value of the given value.
So, the values are 40, 1
i.e., 40 x 1
Therefore, the product value is 40.
e.
Answer: The product value is 0.
Explanation: Given the values are 10, 0.
Now, we need to find the product value of the given value.
So, the values are 10, 0
i.e., 10 x 0
If any value is multiplied by 0, we get the value 0.
Therefore, the product value is 0.
f.
Answer: The product value is 0.
Explanation: Given the values are 20, 0.
Now, we will find the product value of the given value.
So, the values are 20, 0
i.e., 20 x 0
Therefore, the product value is 0.
Question 5.
a.
Answer: The product value is 100.
Explanation: Given the values are 50, 2.
Now, we need to find the product value.
So, the given values are 50, 2
i.e., 50 x 2
Therefore, the product value is 100.
b.
Answer: The product value is 80.
Explanation: Given the values are 40, 2.
Now, we will find the product value.
So, the values are 40, 2
i.e., 40 x 2
Therefore, the product value is 80.
c.
Answer: The product value is 30.
Explanation: Given the values are 10, 3.
Now, we will find the product value.
So, the values are 10, 3
i.e., 10 x 3
Hence, the product value is 30.
d.
Answer: The product value is 60.
Explanation: Given the values are 30, 2.
Now, we will find out the product value.
So, the values are 30, 2
i.e., 30 x 2
Thus, the product value is 60.
e.
Answer: The product value is 100.
Explanation: Given the values are 20, 5.
Now, we will find the product value.
So, the values are 20, 5
i.e., 20 x 5
Therefore, the product is 100.
f.
Answer: The product value is 60.
Explanation: Given the values are 20, 3.
Now, we will find the product value of the given value.
So, the values are 20, 3
i.e., 20 x 3
Therefore, the product value is 60.
Question 6.
a.
Answer: The product value is 40.
Explanation: Given the values are 20, 2.
Now, we will find the product value.
So, the values are 20, 2
i.e., 20 x 2
Hence, after multiplication, the product value is 40.
b.
Answer: The product value is 150.
Explanation: Given the values are 50, 3.
Now, we will find the product value of the given value.
So, the values are 50, 3
i.e., 50 x 3
Therefore, the product value is 150.
c.
Answer: The product value is 200.
Explanation: The values given in the question are 40, and 5.
Now, we will find the product value of the given value.
So, the values are 40, 5
i.e., 40 x 5
Hence, the product value is 200.
d.
Answer: The product value is 120.
Explanation: Given the values are 40, 3.
Now, we will find the product value.
So, the values are 40, 3
i.e., 40 x 3
Therefore, the product value is 120.
e.
Answer: The product value is 70.
Explanation: Given the values are 70, 1.
Now, we will find the product value of the given value.
So, the values are 70, 1
i.e., 70 x 1
Therefore, the product value is 70.
f.
Answer: The product value is 120.
Explanation: Given the values are 60, 2.
Now, we will find the product value of the given value.
So, the values are 60, 2
i.e., 60 x 2
Thus, the product value is 120.
Question 7.
a.
Answer: The product value is 210.
Explanation: Given the values are 70, 3.
Now, we will find the product value of the given value.
So, the values are 70, 3
i.e., 70 x 3
Therefore, the product value is 210.
b.
Answer: The product value is 300.
Explanation: Given the values are 60, 5.
Now, we will find the product value of the given value.
So, the values are 60, 5
i.e., 60 x 5
Therefore, the product value is 300.
c.
Answer: The product value is 120.
Explanation: Given the values are 30, 4.
Now, we will find the product value of the given value.
So, the values are 30, 4
i.e., 30 x 4
Therefore, the product value is 120.
d.
Answer: The product value is 160.
Explanation: Given the values are 20, 8.
Now, we will find the product value of the given value.
So, the values are 20, 8
i.e., 20 x 8
Hence, the product value is 160.
e.
Answer: The final product value is 150.
Explanation: Given that, the values are 30, and 5.
Now, we need to find the product value.
So, the values are 30, 5
i.e., 30 x 5
Therefore, the product value is 150.
f.
Answer: The product value is 90.
Explanation: Given the values are 10, 9.
Now, we will find the product value.
So, the values are 10, 9
i.e., 10 x 9
Thus, the product value is 90.
Question 8.
a.
Answer: The product value is 160.
Explanation: Given the values are 40, 4.
Now, we will find the product value.
So, the values are 40, 4
i.e., 40 x 4
Hence, the product value is 160.
b.
Answer: The product value is 180.
Explanation: Given the values are 90, 2.
Now, we will find the product value of the given value.
So, the values are 90, 2
i.e., 90 x 2
After multiplication, the product value is 180.
c.
Answer: The product value is 280.
Explanation: Given the values are 70, 4.
Now, we will find the product value of the given value.
So, the values are 70, 4
i.e., 70 x 4
Hence, the product value is 280.
d.
Answer: The product value is 400.
Explanation: Given the values are 50, 8.
Now, we need to find the product value.
So, the values are 50, 8.
i.e., 50 x 8
Therefore, the product value is 400.
e.
Answer: The product value is 90.
Explanation: Given the values are 30, 3.
Now, we will find the product value.
So, the values are 30, 3
i.e., 30 x 3
Therefore, the product value is 90.
f.
Answer: The product value is 140.
Explanation: Given the values are 20, 7.
Now, we will find the product value.
So, the values are 20, 7
i.e., 20 x 7
Thus, the final product value is 140.
Question 9.
a.
Answer: The product value is 120.
Explanation: Given the values are 20, 6.
Now, we will find the product value of the given value.
So, the values are 20, 6
i.e., 20 x 6
Therefore, the product value is 120.
b.
Answer: The product value is 180.
Explanation: Given the values are 60, 3.
Now, we will find the product value of the given value.
So, the values are 60, 3
i.e., 60 x 3
Therefore, the product value is 180.
c.
Answer: The product value is 10, 4.
Explanation: Given the values are 10, 4.
Now, we have to find the product value.
So, the values are 10, 4
i.e., 10 x 4
Therefore, the product value is 40.
d.
Answer: The product value is 150.
Explanation: As given that the values are 30, 5.
Now, we will find the product value.
So, the values are 30, 5
i.e., 30 x 5
Therefore, the product value is 150.
e.
Answer: The product value is 90.
Explanation: Given the values are 10, 9.
Now, we will find the product value of the given value.
So, the values are 10, 9
i.e., 10 x 9
Therefore, the product value is 90.
f.
Answer: The final product value is 400.
Explanation: Given the values are 80, 5.
Now, we will find the product value.
So, the values are 80, 5
i.e., 80 x 5
Hence, the product value is 400.
Make a mental computation first. Then, solve each problem.
Question 10.
Kin has 10 friends. She gave each friend 2 apples. How many apples did Kin have?
Mental computation: ______
Kin had __________ apples.
Answer: Kin had 20 apples.
Mental Computation: 10 x 2 = 20
Explanation: As given that,
Kin has 10 friends.
She gave each friend 2 apples.
Now, we will find out how many apples Kin has.
So, the values are 10 friends and 2 apples.
i.e., 10 x 2
Hence, Kin has 20 apples.
Question 11.
Each of Mr. Black’s 4 daughters needs new shoes. Each pair of shoes will cost 30 dollars. How much money will Mr. Black spend on all 4 pairs of shoes?
Mental computation: ______
Mr. Black will spend _____ dollars on the 4 pairs of shoes.
Answer: Mr. Black will spend 120 dollars on the 4pairs of shoes.
Mental Computation: 30 x 4 = 120.
Explanation: Given that,
Mr. Black’s 4 daughters need new shoes.
Each pair of shoes will cost 30 dollars.
Now, we will find out how much money will Mr. Black spend on all 4 pairs of shoes.
So, the values are 30, 4
i.e., 30 x 4
Hence, Mr.Black spend 120 dollars for 4 pairs of shoes.
Solve each problem.
Question 12.
There are 30 students in each classroom. If there are 5 classrooms, how many total students are there?
There are a total of __________ students.
Answer: There are a total of 150 students.
Explanation: Given that,
There are 30 students in each classroom.
There are 5 classrooms.
Now, we will find out how many total students are there.
So, the values are 30, 5
i.e., 30 x 5
Therefore, the total number of students is 150.
Question 13.
There are 7 friends that each have 2 dollars. How much money do the 7 friends have?
The friends have a total of __________ dollars.
Answer: The friends have a total of 14 dollars.
Explanation: As given in the question, the data is
There are 7 friends.
Each has 2 dollars.
Now, we have to find out how much money the 7 friends have.
Then the values are 7, 2.
i.e., 7 x 2
Thus, the friends have a total of 14 dollars.
Question 14.
There are a total of 20 students in Ms. Walker’s class, If each student receives 4 papers, how many papers are there?
There are _____ papers in all.
Answer: There are 80 papers in all.
Explanation: As given in the question,
There are a total of 20 students in Ms. Walker’s class.
Each student receives 4 papers.
Now, we will find out how many papers are there.
So, the values are 20, 4
i.e., 20 x 4
Therefore, the over all papers is 80.