Decimal Operations in Multiplication

This video tutorial explains how to multiply decimal numbers by one-digit numbers using short multiplication. It provides three examples: 5 x 4.3, 3 x 5.24, and 4 x 1.346, demonstrating the process of aligning numbers, ignoring decimal points initially, and then placing the decimal point in the final answer. The video also includes practice problems for viewers to solve.

What is the first step in multiplying a decimal by a one-digit number?

• Add the numbers together.

• Ignore the decimal point and multiply as whole numbers.

• Divide the numbers first.

• Multiply the decimal point by 10.

When multiplying 5 by 4.3, what is the result before adjusting for the decimal?

• 21.5

• 43

• 5.43

• 215

How many decimal places should the answer have when multiplying 5 by 4.3?

• None

• One

• Two

• Three

What is the inverse operation used to adjust the decimal point in 5 x 4.3?

• Multiplication

• Subtraction

• Addition

• Division

What is the result of multiplying 5 by 4.3 before adjusting for the decimal?

• 21.5

• 215

• 43

• 5.43

What is the inverse operation used to adjust the decimal point in 5 x 4.3?

• Subtraction

• Addition

• Division

• Multiplication

What is the result of multiplying 5 by 4.3 before adjusting for the decimal?

• 215

• 43

• 5.43

• 21.5

In the example of 3 x 5.24, what is the first multiplication step?

• 3 x 5

• 3 x 4

• 3 x 2

• 3 x 524

How many decimal places should the answer have when multiplying 3 by 5.24?

• Three

• One

• None

• Two

What is the result of 3 x 5.24 before adjusting for the decimal?

• 15.72

• 1572

• 524

• 3.524