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.
Answer:
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 = _____
Answer:
Given that,
2 x 32 = 64.
Number of ones are 4.
The number of tens are 6.
Talk About It
Question 1.
How would you model 2 × 22?
Answer:
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.
Answer:
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 = _____
Answer:
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 = ____
Answer:
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 = ____
Answer:
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 = ___
Answer:
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 = ____
Answer:
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 = ____
Answer:
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 = ___
Answer:
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 = ____
Answer:
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?
Answer:
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?
Answer:
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?
Answer:
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?
Answer:
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?
Answer:
Given that,
Each prize is worth 3 tickets at the game center.
The number of prizes for 23 prizes are 3 x 23 = 69.
Therefore there are 69 tickets for 23 prizes.