Mastering Decimal Multiplication Techniques

This video provides a quick review of multiplying decimals, suitable for learners at various educational levels. It includes two examples: multiplying 6.7 by 4 and 5.21 by 3.8. The process involves removing decimals, multiplying as with whole numbers, and then placing the decimal in the result based on the original problem. The video concludes with a summary of these steps.

What is the first step when multiplying decimals?

• Convert decimals to fractions

• Divide the decimals

• Remove the decimals

• Add the decimals together

Tags

CCSS.5.NBT.B.7

In the example 6.7 times 4, what is the product of 67 times 4?

• 268

• 26.8

• 28

• 24

Tags

CCSS.5.NBT.B.7

How many digits should be to the right of the decimal in the answer for 6.7 times 4?

• Two

• Three

• One

• None

Tags

CCSS.6.NS.B.3

What is the final answer for 6.7 times 4?

• 26.8

• 268

• 2.68

• 26.08

Tags

CCSS.6.NS.B.3

In the example 5.21 times 3.8, what is the product of 521 times 38?

• 19898

• 19878

• 19978

• 19798

Tags

CCSS.6.NS.B.3

How many digits should be to the right of the decimal in the answer for 5.21 times 3.8?

• Four

• One

• Two

• Three

Tags

CCSS.6.NS.B.3

What is the final answer for 5.21 times 3.8?

• 19.798

• 19.789

• 19.879

• 19.987

Tags

CCSS.6.NS.B.3

What should you do after multiplying the whole numbers in a decimal multiplication problem?

• Add the decimals back in the answer

• Subtract the decimals

• Ignore the decimals

• Divide the answer by 10

Tags

CCSS.5.NBT.B.7

How do you determine where to place the decimal in the final answer?

• Count the total digits in the problem

• Count the digits to the right of the decimal in the original numbers

• Place it at the end of the number

• Place it at the beginning of the number

Tags

CCSS.5.NBT.B.7

What is the general method for multiplying decimals?

• Convert to fractions, then multiply

• Divide the numbers first, then multiply

• Multiply as whole numbers, then place the decimal

• Add the decimals first, then multiply

Tags

CCSS.5.NBT.B.7