McGraw Hill My Math Grade 3 Chapter 7 Lesson 2 Answer Key Divide by 3

All the solutions provided in McGraw Hill My Math Grade 3 Answer Key PDF Chapter 7 Lesson 2 Divide by 3 will give you a clear idea of the concepts.

McGraw-Hill My Math Grade 3 Answer Key Chapter 7 Lesson 2 Divide by 3

Math in My World

Example 1

Max, Maria, and Tani have 24 markers in all. Each person has the same number of markers. How many markers does each person have?

Find the unknown quotient.
One Way: Use the multiplication table.

1. Locate row 3. Circle the divisor.
2. Follow row 3 to 24. Circle the dividend.
3. Move straight up the column to 8. Circle the quotient.

The unknown quotient is ___________.

Another Way: Use a related fact.
Find 24 ÷ 3 by thinking of a related multiplication fact.

The unknown factor is _______________ .
So, or 24 ÷ 3 = _______________. The unknown is _______________.
Each person has _______________ markers.
Answer:
Given that,
The Max, Maria, and Tani have 24 markers in all.
Each person has the same number of markers.
The number of markers that each person have is

The unknow quotient is 7.
The divisor is 3.
The dividend is 24.
The unknown is 7.
Each person has 7 markers.

Example 2

To travel to the beach, Angela and her 5 friends will divide up equally into 3 cars. How many friends will be in each car?
Find 6 ÷ 3.
Skip count backwards to find the quotient.
1. Start at 6 and skip count back by 3s to 0.

2. Count the number of jumps. There were _______________ jumps.
So, 6 ÷ 3 = ________________.
Each car will have _____________ friends.
Answer:
Angela and her 6 friends will divide up equally into 3 cars.
The number of friends in each car is 6 ÷ 3 = 2.
Known count the number of jumps.
There were two jumps.
Each car will have 2 friends.

Talk Math

Look back at the circled numbers on the multiplication table. Write the four related facts for the 3 numbers.

Answer:
The facts of 3 in the multiplication table is
The 3 is divisor.
The 3 is in the 3rd  row and 3rd column.
The product of 3 x 3 is 9.
The division 24 ÷ 3 = 7.

Guided Practice

Find 21 ÷ 3 using the multiplication table.

Question 1.
Locate row 3. Circle the divisor.
Answer:
21 ÷ 3 = 21
The divisor is 3.

Question 2.
Follow row 3 to 21. Circle the dividend.
Answer:
21 ÷ 3 = 21
The divisor is 3.
The row is 5.

Question 3.
Circle the quotient to solve.
21 ÷ 3 = _______________
Answer:
21 divided by 3 equal to 7.
The quotient is 7.
Circle the 7 in the multiplication table.

Question 4.
Skip count to find the quotient.
12 ÷ 3 = _______________

Answer:
12 divided by 3 equal to 4.
12 ÷ 3 = 4.
Skip the quotient 4.

Independent Practice

Skip count backwards to find the quotient.

Question 5.

24 ÷ 3 = _____________
Answer:
24 divided by 3 equal to 8.
24 ÷ 3 = 8.

Algebra Use a related multiplication fact to find the unknown.

Question 6.
15 ÷ 3 =
3 × ____________ = 15
The unknown is ______________.
Answer:
15 divided by 3 equal to 5.
15 ÷ 3 = 5.
Multiplication of 3 with 5 then you get 15.
3 x 5 = 15.
The unknown is 5.

Question 7.

3 × ____________ = 27
The unknown is ______________.
Answer:
27 divided by 3 equal to 9.

Multiplication of 3 with 9 then you get 27.
3 x 9 = 27.
The unknown is 9.

Question 8.

3 × ____________ = 21
The unknown is ______________.
Answer:
21 divided by 3 equal to 7.

Multiplication of 3 with 7 then you get 21.
3 x 7 = 21.
The unknown is 7.

Algebra Find each unknown to solve the puzzle. Write the letter corresponding to each quotient on the line above each exercise number.

Answer:
In the first row.
The sentence is
3 x 5 = 15.
15 ÷ 3 = 5.
The unknown is 5.
The letter of the quotient is v.

Question 9.
3 ÷ 3 = _______________
Answer:
3 divided by 3 equal to 1.
3 ÷ 3 = 1.

Question 10.
9 ÷ = 3 ______________
Answer:
9 divided by 3 equal to 3.
9 ÷ 3 = 3.

Question 11.
15 ÷ = 3 _______________
Answer:
15 divided by 5 equal to 3.
15 ÷ 5 = 3.

Question 12.
27 ÷ 9 = ________________
Answer:
27 divided by 9 equal to 3.
27 ÷ 9 = 3.

Question 13.
÷ 3 = 8 ________________
Answer:
24 divided by 3 equal to 8.
24 ÷ 3 = 8.

Question 14.
6 ÷ 2 = _______________
Answer:
6 divided by 2 equal to 3.
6 ÷ 2 = 3

Question 15.
÷ 3 = 4 ________________
Answer:
12 divided by 3 equal to 4.
12 ÷ 3 = 4.

Question 16.
18 ÷ 3 = ________________
Answer:
18 divided by 3 equal to 6.
18 ÷ 3 = 6

Problem Solving

Question 17.
Mathematical PRACTICE Model Math A soccer coach buys 3 equally-priced soccer balls for $21. What is the price for each ball? Write a division sentence. Then label each price tag.

Answer:
Given that,
A soccer coach buys 3 equally-priced soccer balls for $21.
The price of each ball is $21 ÷ 3 = $7.
Therefore the cost of each ball is $7.

Question 18.
Stanley is on a 3-day hike. He will hike a total of 18 miles. If he hikes the same number of miles each day, how many miles will he hike the first day?
Answer:
Given that,
Stanley is on a 3-day hike.
He will hike a total of 18 miles.
The number of miles he hikes in each day is
18 ÷ 3 = 6.
Therefore Stanley hike the number of miles in first day is 6.

Question 19.
Mathematical PRACTICE Make a Plan Jessica arranged 27 stickers in 3 equal rows. Then she gave 1 row of stickers to Dane and 3 stickers to Kim. How many stickers does Jessica have left?
Answer:
Given that,
Jessica arranged 27 stickers in 3 equal rows.
The number of stickers in each row is 27 ÷ 3 = 9.
There are 9 stickers in each row.
Then she gave 1 row of stickers to Dane.
Know the number of stickers near Jessica is 27 – 9 = 18.
In 18 stickers 3 stickers given to Kim.
So, 18 – 3 = 15.
Therefore the number of stickers near Jessica is 15.

HOT Problems

Question 20.
Mathematical PRACTICE Identify Structure There are 24 bananas to be divided equally among 3 monkeys. How many bananas will each monkey receive?
Rewrite the story using a related multiplication fact. Solve.
Answer:
Given that,
There are 24 bananas to be divided equally among 3 monkeys.
The number of bananas that each monkey receive is 24 ÷ 3 = 8.
Therefore each monkey receive 8 bananas.
The story related to the question is.
There are 12 bananas to be divided equally among 4 monkeys. How many bananas will each monkey receive?
The number of bananas that each monkey receive is 12 ÷ 4 = 3.
Therefore each monkey receive 3 bananas.

Question 21.
Building on the Essential Question Besides using models, how else can I find 18 ÷ 3?
Answer:
Using the multiplication table we can find the 18 ÷ 3.
18 ÷ 3 = 6.

McGraw Hill My Math Grade 3 Chapter 7 Lesson 2 My Homework Answer Key

Practice

Algebra Use a related multiplication fact to find the unknown.

Question 1.
30 ÷ 3 =
3 × ______________ = 30
The unknown is ______________.
Answer:
30 divided by 3 equal to 10.
30 ÷ 3 = 10.
The multiplication of 3 with 10 then you get 30.
3 x 10 = 30.
The unknown is 10.

Question 2.
18 ÷ 3 =
3 × ______________ = 18
The unknown is ______________.
Answer:
18 divided by 3 equal to 6.
18 ÷ 3 = 6.
Multiplication of 3 with 6 then you get 18.
3 x 6 = 18.
The unknown is 6.

Question 3.
15 ÷ 3 =
3 × ______________ = 15
The unknown is ______________.
Answer:
15 divided by 3 equal to 5.
15 ÷ 3 = 5.
Multiplication of 3 with 5 then you get 15.
3 x 5 = 15.
The unknown is 5.

Question 4.
21 ÷ 3 =
3 × ______________ = 21
The unknown is ______________.
Answer:
21 divided by 3 equal to 7.
21 ÷ 3 = 7.
Multiplication of 3 with 7 then you get 21.
3 x 7 = 21.
The unknown is 7.

Use the multiplication table to divide.

Question 5.
24 ÷ 3 = ______________
Answer:
24 divided by 3 equal to 8.
24 ÷ 3 = 8.

Question 6.
9 ÷ 3 = _______________
Answer:
9 divided by 3 equal to 3.
9 ÷ 3 = 3.

Question 7.
27 ÷ 3 = _______________
Answer:
27 divided by 3 equal to 9.
27 ÷ 3 = 9.

Question 8.
3 ÷ 3 = ______________
Answer:
3 divided by 3 = 1.
3 ÷ 3 = 1.

Question 9.
18 ÷ 3 = _________________
Answer:
18 divided by 3 equal to 6.
18 ÷ 3 = 6.

Problem Solving

Question 10.
Alana mailed 6 letters in 3 different mailboxes. She put the same number of letters in each mailbox. How many letters did Alana put in each mailbox?
Answer:
Given that,
Alana mailed 6 letters in 3 different mailboxes.
The number of letters did Alana put in each mailbox is 6 ÷ 3 = 2.
Therefore there are 2 mails in each mailbox.

Question 11.
Mathematical PRACTICE Use Number Sense Ms. Banks divides 18 basketballs evenly among 3 bags. For class, she takes 2 basketballs from each bag. How many basketballs are left in one of the bags?
Answer:
Given that,
Ms. Banks divides 18 basketballs evenly among 3 bags.
She takes 2 basketballs from each bag.
The number of balls taken are 2 x 3 = 6.
Know we have 18 – 6 = 12.
We have 12 basketballs in 3 bags.
The number of basketballs in each bag is 12 ÷ 3 = 4.
Therefore there the 4 basketballs in each bag.

Test Practice

Question 12.
Elyse served herself and 2 friends 24 ounces of juice. She poured the same amount of juice in each glass. How many ounces of juice were in each glass?
(A) 22 ounces
(B) 12 ounces
(C) 8 ounces
(D) 6 ounces
Answer:
Given that,
Elyse served herself and 2 friends.
The number of persons are 3.
They served 24 ounces of juice.
The number of ounces of juice were in each glass is 24 ÷ 3 = 8.
Option C is the correct answer.