Decimal Multiplication Concepts

Matt with Mr. J explains how to multiply decimals by first removing the decimals, performing the multiplication, and then placing the decimal back in the result. The example used is 5.7 times 0.8, which is simplified to 57 times 8. After calculating, the decimal is placed back to give the final answer of 4.56. The video concludes with a quick review and a link to a more detailed explanation.

What is the first step in solving a decimal multiplication problem?

• Add the decimals together

• Remove the decimals and multiply as whole numbers

• Divide the numbers

• Multiply the decimals directly

What is the result of multiplying 57 by 8?

• 455

• 456

• 460

• 452

How many digits should be to the right of the decimal in the final answer?

• None

• One

• Two

• Three

Where should the decimal be placed in the number 456 to get the correct answer?

• Before the 4

• Between the 4 and 5

• After the 6

• Between the 5 and 6

What is the final answer when multiplying 5.7 by 0.8?

• 0.456

• 4.56

• 456

• 45.6