Multiplying Decimals and Powers of 10

Natalie Rhodes introduces a fifth-grade math lesson on multiplying decimals by powers of 10. The lesson covers understanding patterns in multiplication, focusing on DNA strand lengths and cost calculations. Students learn to move decimal points and recognize place value changes when multiplying by powers of 10.

What is the main objective of this lesson?

• To practice addition and subtraction of decimals.

• To explore the history of mathematics.

• To understand the concept of multiplying decimals by powers of 10.

• To learn how to divide decimals by powers of 10.

What is the length of one uncoiled DNA strand in meters?

• 71.0 meters

• 0.71 meters

• 1.8 meters

• 18.0 meters

How do you multiply a whole number by 10 using powers of 10?

• Add a zero to the end of the number.

• Divide the number by 10.

• Subtract a zero from the number.

• Move the decimal point to the left.

What happens to the decimal point when multiplying 1.8 by 10?

• It moves to the left.

• It disappears.

• It stays in the same place.

• It moves to the right.

What is the result of multiplying 71.0 by 10?

• 71.0

• 710

• 7100

• 7.10

What is the result of multiplying 1.8 by 10?

• 18

• 1.8

• 0.18

• 180

What is the result of multiplying 71 by 100?

• 71000

• 7100

• 710

• 71

What is the result of multiplying 1.8 by 100?

• 18

• 180

• 1.8

• 1800

What is the result of multiplying 1.8 by 1000?

• 18

• 180

• 1.8

• 1800

What is the result of multiplying 71 by 1000?

• 710

• 7100

• 71

• 71000