McGraw Hill My Math Grade 4 Chapter 3 Lesson 3 Answer Key Multiplication as Comparison

All the solutions provided in McGraw Hill Math Grade 4 Answer Key PDF Chapter 3 Lesson 3 Multiplication as Comparison will give you a clear idea of the concepts.

McGraw-Hill My Math Grade 4 Answer Key Chapter 3 Lesson 3 Multiplication as Comparison

Math in My World

Example 1
Mary attended camp for 7 days this summer. Tyler attended 3 times as many days as Mary. Find the number of days Tyler attended camp.

1. Model Mary’s days at camp as ____ group of 7 days. Draw your model.
2. Tyler attended 3 times as many days at camp. Model Tyler’s days at camp as ___ groups of 7. Draw your model.
3. Find the total of 3 groups of 7.
____ + ___ + ____ = ____
or
____ × ___ = ____
So, Tyler attended camp for ____ days.

A type of model drawing is the bar diagram. A bar diagram can help you understand a problem and plan to solve it.

Given that,
Mary attended camp for 7 days this summer.
Tyler attended 3 times as many days as Mary.
Mary’s days at camp as 3 group of 7 days.

3 groups of 7 is 7 + 7 + 7 = 21.
or
7 x 3 = 21.
So, Tyler attended camp for 21 days.
The bar diagram of 3 groups of 7 is

Example 2.

1. The bar diagram models this problem.

3 × ? = 15 3 × ___ = 15 beads ← Use a fact family.

Given that,
Suki used 15 beads to make a bracelet.
The multiplication equation is
3 x 5 = 15.

Talk Math
One way to interpret 24 = 8 × 3 is to say that 24 is 8 times as many as 3. What is another way you can interpret this equation?

Given that the equation is.
24 = 8 × 3.
The another way to represent the equation is
8 + 8 + 8 = 24.

Guided Practice

Question 1.
Use multiplication or division to complete the equation for the phrase below.
3 times as much

3 × 3 = ?
3 × 3 = ____
Given that,
3 times has much has 3 balls.
Multiplication of 3 with 3 then you get 9.
3 x 3 = 9.
Therefore 3 times of 3 is 9.

McGraw Hill My Math Grade 4 Chapter 3 Lesson 3 My Homework Answer Key

Practice

Write a multiplication equation to describe each model.

Question 1.
4 times more

Given that,
4 times of 4 balls.
Multiplication of 4 with 4 then you get 16.
4 x 4 = 16.
Therefore 4 times of 4 is 16.

Question 2.
2 times as much

Given that,
2 times as much as 3 balls.
Multiplication of 2 with 3 then you get 6.
2 x 3 = 6.
Therefore 2 times of 3 is 6.

Question 3.
6 times as many

Given that,
6 times as many as 4 balls.
Multiplication of 6 with 4 then you get 24.
6 x 4 = 24.
Therefore 6 times of 4 is 24.

Question 4.
twice as many

Given that,
Twice as many as two balls.
Multiplication of 2 with 2 then you get 4.
2 x 2 = 4.
Therefore twice as many as 2 is 24.

Question 5.
3 times more

Given that,
3 times more has 4 balls.
Multiplication of 3 with 4 then you get 12.
Therefore 3 times more as 4 is 12.

Question 6.
5 times as much

Given that,
5 times as much as 1 ball.
Multiply 5 with 1 then you get 5.
5 x 1 = 5.
Therefore 5 times of 1 is 5.

Mathematical PRACTICE 4 Model Math Complete each bar diagram. Then complete the multiplication equation.

Question 7.
4 times as much money as $5. 4 × ___ = ____ Answer: Given that, 4 times as much money as$5.

Multiplication of 4 with $5 then you get$20.
4 x $5 =$20.

Question 8.
2 times as many books as 7 books

___ × ___ = ____
Given that,
2 times as many books as 7 books.

Multiplication of 2 with 7 then you get 14.
2 x 7 = 14.

Problem Solving

Question 9.
Henry has 3 gerbils. Hannah has 3 times as many. How many gerbils does Hannah have?
Given that,
Henry has 3 gerbils.
Hannah has 3 times as many.
So, Multiplication of 3 with 3 then you get 9.
3 x 3 = 9.
Therefore there are 9 gerbils near Hannah have.

Question 10.
Dani needs 6 times as many red beads as gold beads. She needs 7 gold beads. How many red beads does Dani need?
Given that,
So, Multiplication of 6 with 7 then you get 42.
6 x 7 = 42.
Therefore there are 42 red beads.

Question 11.
Draw a bar diagram to represent 6 times more than $4. Answer: Given that, 6 times more than$4.
Multiplication of 6 with $4 then you get$24.
6 x $4 =$24.

Test Practice

Question 12.
Amelia swam four times as many laps as Wesley. Wesley swam 7 laps. How many laps did Amelia swim?
A. 11 laps
B. 28 laps
C. 35 laps
D. 21 laps