Understanding the Standard Algorithm for Multiplication

The video tutorial demonstrates the standard algorithm for multiplication using the example of 34 multiplied by 25. It begins by stacking the numbers according to their place values and then breaks down the multiplication into two parts: first multiplying by 5 and then by 20. The tutorial explains each step, including regrouping and adding partial products, to arrive at the final answer of 850.

What is the first step in setting up a multiplication problem using the standard algorithm?

• Align the numbers by their decimal points.

• Stack the numbers according to their place values.

• Write the numbers in a single line.

• Convert the numbers to fractions.

When multiplying 34 by 5, what is the result of 5 times 4?

• 30

• 25

• 20

• 15

After calculating 5 times 4, what should be done with the number 2?

• Regroup it into the tens place.

• Subtract it from the tens place.

• Add it to the ones place.

• Ignore it.

What is the sum of 15 and 2 when multiplying 5 times 3?

• 19

• 18

• 17

• 16

Why is a zero placed in the second row when multiplying 34 by 20?

• To indicate a decimal point.

• To mark the end of the calculation.

• To align with the tens place.

• To separate the two numbers.

What is the result of multiplying 2 times 4 in the second part of the problem?

• 8

• 6

• 9

• 7

What is the result of multiplying 2 times 3 in the second part of the problem?

• 5

• 6

• 8

• 7

What is the sum of 170 and 680?

• 1050

• 750

• 950

• 850

What is the final result of multiplying 34 by 25?

• 900

• 850

• 800

• 750

What is the purpose of regrouping in the standard algorithm of multiplication?

• To make the numbers smaller.

• To adjust the place values.

• To convert the numbers to decimals.

• To simplify the numbers.