Review for You: Multiplying with Regrouping

The video tutorial covers the concept of multiplying numbers with regrouping, emphasizing the importance of organizing place values. It provides examples of multiplying two-digit by one-digit, three-digit by one-digit, two-digit by two-digit, and three-digit by two-digit numbers. Each example demonstrates the step-by-step process of multiplication, including regrouping and using placeholders, to ensure accurate results.

Why is it important to organize place values when multiplying numbers?

• To make the numbers look neat

• To avoid errors in calculation

• To use less paper

• To make the process faster

When multiplying 18 by 4, what is the result after regrouping?

• 74

• 68

• 64

• 72

In the example of multiplying 243 by 7, what is the final product?

• 1601

• 1701

• 1751

• 1801

What is the purpose of writing a zero as a placeholder when multiplying two-digit numbers?

• To keep the place values aligned

• To make the calculation easier

• To make the number larger

• To simplify the addition process

What is the result of multiplying 25 by 43?

• 1050

• 1075

• 1100

• 1150

When multiplying 638 by 56, what is the final product?

• 33,728

• 36,728

• 34,728

• 35,728

In the multiplication of 638 by 56, what additional place value column is introduced?

• Ten thousands

• Thousands

• Hundreds

• Millions