Double Digit Multiplication for Fourth Graders

The video tutorial covers the multiplication of numbers using manual methods. It begins with solving 25 times 10, explaining each step in detail, and emphasizes the importance of double-checking work. The tutorial also covers an alternative method by swapping factors and verifies the solution. It then moves on to a more complex problem, 25 times 55, providing a detailed walkthrough. The video concludes with a review of the process and stresses the importance of manual calculations in situations where calculators are unavailable.

What is the result of 1 times 5 in the multiplication process of 25 by 10?

• 5

• 10

• 1

• 0

What is the product of multiplying 25 by 10?

• 350

• 205

• 255

• 250

What is the first step in verifying the multiplication of 25 by 10?

• Add the results

• Multiply 25 by 10

• Multiply 10 by 25

• None of the above

How do you verify the multiplication of 25 by 10?

• Subtract the numbers

• None of the above

• Flip the numbers

• Divide the numbers

When multiplying 25 by 55, what is the result of 5 times 5?

• 25

• 10

• 55

• 5

In the multiplication of 25 by 55, what do you do with the number 25 obtained from 5 times 5?

• Write 2

• Ignore it

• Carry over 2 and write 5

• Write 25

What is the carried number when multiplying the first 5 in 55 by the second 5 in 25?

• 2

• 5

• 10

• None

What is the final result of multiplying 25 by 55?

• 1357

• 1275

• 1575

• 1375

Why is it important to learn manual multiplication?

• None of the above

• Only method available

• Faster than a calculator

• Useful in remote locations

What scenario is described as a potential situation where manual calculation might be necessary?

• Smartphone confiscated

• Calculator runs out of battery

• Calculator lost during Christmas break

• All of the above