# McGraw Hill My Math Grade 4 Chapter 4 Lesson 3 Answer Key Use Place Value to Multiply

All the solutions provided in McGraw Hill Math Grade 4 Answer Key PDF Chapter 4 Lesson 3 Use Place Value to Multiply will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 4 Answer Key Chapter 4 Lesson 3 Use Place Value to Multiply

Grace and her friends are at the mall. They see 3 rows of parked cars. There are 23 cars in each row. How many cars are there altogether?

Find 2 × 32 using models.

1. Circle the ones. Count the number of ones.

2. Circle the tens. Count the number of tens.

So, Grace and her friends see ___ cars.

Given that,
They see 3 rows of parked cars.
There are 23 cars in each row.
23 + 23 + 23 = 69.

The number of ones are 9.

The number of tens are 6.
So, Grace and her friends see 69 cars.

Try It

Find 2 × 32 using models.

1. Model 2 × 32.

2. Circle the ones. Then count the ones.
Complete the place-value chart.

3. Circle the tens. Count the number of tens.
Complete the place-value chart.

So, 2 × 32 = _____

Given that,
2 x 32 = 64.

Number of ones are 4.

The number of tens are 6.

Question 1.
How would you model 2 × 22?
Multiplication of 2 with 22 then you get 44.
2 x 22 = 44.

Question 2.
Mathematical PRACTICE 3 Justify Your Conclusion Would you rather use base-ten blocks, counters, or mental math to model Activity 1? Explain.
For model activity you can use base-ten blocks, counters or mental math.
The base -ten blocks can be used to develop the addition, subtraction, multiplication and division.

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

Practice

Multiply. Draw the models if needed.

Question 1.
2 × 23 = _____
Multiplication of 2 with 23 then you get 46.
2 x 23 = 46.

Number of ones are 6.
Number of tens are 4.

Question 2.
4 × 21 = ____
Multiplication of 4 with 21 then you get 84.
4 x 21 = 84.

The number of tens are 8.
The number of ones are 4.

Question 3.
2 × 22 = ____
Multiplication of 2 with 22 then you get 44.
2 x 22 = 44.

The number of ones are 4.
The number of tens are 4.

Question 4.
3 × 11 = ___
Multiplication of 3 with 11 then you get 33.

Number of ones are 3.
Number of tens are 3.

Multiply. Draw the models if needed.

Question 5.
3 × 32 = ____
Multiplication of 3 with 32 then you get 96.
3 x 32 = 96.

The number of ones are 6.
The number of tens are 9.

Question 6.
2 × 43 = ____
Multiplication of 2 with 43 then you get 86.
2 x 43 = 86.

The number of ones are 6.
The number of tens are 8.

Question 7.
4 × 12 = ___
Multiplication of 4 with 12 then you get 48.
4 x 12 = 48.

Number of tens are 4.
Number of ones are 8.

Question 8.
3 × 21 = ____
Multiplication of 3 with 21 then you get 63.
3 x 21 = 63.

Number of tens are 6.
Number of ones are 3.

Problem Solving

Mathematical PRACTICE 2 Use Algebra Write an equation to solve.

Question 9.
Julie hung 3 birdfeeders in her yard. Each birdfeeder has 12 perches. How many perches are there altogether?
Given that,
Julie hung 3 birdfeeders in her yard.
Each birdfeeder has 12 perches.
So, 3 x 12 = 36.
Therefore there are 36 perches in altogether.

Question 10.
There are 32 chairs in each classroom. What is the total number of chairs in 2 classrooms?
Given that,
The number of chairs in each classroom is 32.
The total number of classrooms are 2.
So, 32 x 2 = 64.
Therefore there are 64 chairs in 2 classrooms.

Question 11.
Lance took 34 photos each day of his vacation. He was on vacation for 2 days. Which equation describes how many photos he took in all?
Given that,
Lance took 34 photos each day of his vacation.
He was on vacation for 2 days.
So, 34 x 2 = 68.
Therefore there are 68 photos in 2 days of vacation.

Question 12.
There are 42 biscuits in each box. How many biscuits are in 2 boxes?
Given that,
Number of boxes are 2.
The number of biscuits in each box is 42.
So, 2 x 42 = 84.
Therefore there are 84 biscuits in 2 boxes.

Question 13.
Each prize is worth 3 tickets at the game center. How many tickets are needed for 23 prizes?