Multiplication by Two-Digit Numbers

The video tutorial explains how to multiply multi-digit numbers using the standard method. It begins with an introduction to multiplying by a two-digit number, followed by a detailed example of multiplying 42 by 13. The process involves arranging numbers in columns, multiplying each digit, and adding results. A second example demonstrates multiplying 851 by 26, reinforcing the method. The lesson concludes with a summary of the multiplication process.

What is the first step in setting up a multiplication problem with two-digit numbers?

• Write the numbers in a single line.

• Arrange the numbers in columns from right to left.

• Arrange the numbers in columns from left to right.

• Write the numbers side by side.

When multiplying the ones digit of the bottom factor, where do you start writing the results?

• In the tens column.

• In the thousands column.

• In the hundreds column.

• In the ones column.

What is the value of the tens digit in the number 13?

• 3

• 10

• 0

• 1

Why do we use a zero as a placeholder when multiplying the tens digit of the bottom factor?

• To simplify the addition process.

• To make the calculation easier.

• To align the results correctly.

• To avoid mistakes.

What is the product of 42 and 13 using the standard multiplication method?

• 512

• 520

• 560

• 546

In the second example, what is the first result obtained after multiplying the ones digit of the bottom factor?

• 5116

• 5006

• 5106

• 5016

What is the final product of multiplying 851 by 26?

• 23,126

• 21,126

• 22,126

• 20,126