Mastering Decimal Multiplication Techniques

The video tutorial teaches how to multiply decimals using a real-life example involving brownies. It explains the process using a 10x10 grid to visually represent the multiplication of decimals. The tutorial provides practice problems to reinforce the concept, both with and without the grid method. The video concludes with encouragement to practice more problems independently.

Carson has 6/10 of a pan of brownies. If her friends ate 8/10 of what was left, how much of the pan did they eat?

• 0.48

• 0.68

• 0.28

• 0.58

Tags

CCSS.5.NF.B.6

To find 8/10 of 6/10, which mathematical operation should you use?

• Addition

• Subtraction

• Multiplication

• Division

Tags

CCSS.5.NF.B.5B

What does the green area represent when using a 10 by 10 grid to multiply 8/10 by 6/10?

• The sum of the two fractions

• The quotient of the two fractions

• The difference between the two fractions

• The product of the two fractions

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

How many hundredths of the grid are covered when multiplying 8/10 by 6/10?

• 58

• 68

• 48

• 28

Tags

CCSS.5.NF.B.6

When multiplying decimals without a grid, what should you do after performing the multiplication?

• Add the number of digits behind the decimal in the problem to the answer

• Ignore the decimal places

• Circle the number of digits behind the decimal in the problem and place the same number of digits behind the decimal in the answer

• Subtract the number of digits behind the decimal in the problem from the answer

Tags

CCSS.5.NBT.B.7

If a problem has four digits behind the decimal, how many digits should be behind the decimal in the solution?

• Five

• Four

• Two

• Three

Tags

CCSS.5.NBT.B.7

What is the first step in multiplying decimals without a grid?

• Divide the numbers

• Subtract the decimals

• Multiply the numbers as if they were whole numbers

• Add the decimals

Tags

CCSS.6.NS.B.3

What should you do after finishing the multiplication of decimals without a grid?

• Circle the number of digits behind the decimal in the problem and place the same number of digits behind the decimal in the answer

• Subtract the decimal places

• Ignore the decimal places

• Add the decimal places

Tags

CCSS.5.NBT.B.7