Mastering Decimal Division Techniques

This video tutorial for 5th graders covers lesson 5.6 on dividing decimals. It begins with an essential question about placing the decimal point in the quotient. The teacher demonstrates several examples, including dividing 0.4 by 0.2, 5.18 by 0.37, and 12.24 by 0.34, emphasizing the importance of converting divisors to whole numbers by multiplying by powers of 10. The tutorial also includes real-world problem-solving examples, such as calculating the cost of grapes and the time to kayak a certain distance. The lesson concludes with homework assignments and self-assessment instructions.

What is the essential question for this lesson?

• How can you add decimals?

• How can you place the decimal point in the quotient?

• How can you subtract decimals?

• How can you multiply decimals?

What is the first step in dividing 0.4 by 0.2?

• Subtract the numbers

• Multiply the divisor by a power of 10

• Add the numbers

• Divide directly

After multiplying the divisor and dividend by 10, what is the new division problem for 0.4 divided by 0.2?

• 4 divided by 2

• 0.04 divided by 0.02

• 0.4 divided by 0.2

• 40 divided by 20

How many times do you need to move the decimal point to the right to make 0.37 a whole number?

• One time

• Two times

• Four times

• Three times

What is the result of 5.18 divided by 0.37 after moving the decimal points?

• 18

• 16

• 14

• 12

What is the first step in dividing 12.24 by 0.34?

• Multiply the divisor by a power of 10

• Divide directly

• Subtract the numbers

• Add the numbers

After multiplying the divisor and dividend by 100, what is the new division problem for 12.24 divided by 0.34?

• 1.224 divided by 0.034

• 1224 divided by 34

• 12.24 divided by 0.34

• 122.4 divided by 3.4

How many pounds of grapes does Clarissa buy if she pays $2.55 and the cost per pound is $0.85?

• 5 pounds

• 2 pounds

• 3 pounds

• 4 pounds

How many hours will it take Damen to kayak 6.4 miles at an average speed of 1.6 miles per hour?

• 5 hours

• 4 hours

• 3 hours

• 2 hours

What is the key to decimal division?

• Subtracting the numbers

• Multiplying the divisor by a power of 10

• Adding the numbers

• Dividing directly