Powers of 10

Explain the concept of powers of 10 in division.

• Powers of 10 represent how many places to move the decimal point when dividing.

• Powers of 10 are used to multiply numbers by ten.

• Powers of 10 indicate the number of zeros in a number.

• Powers of 10 are irrelevant in division.

What is the result of 0.5 multiplied by 1,000?

• 250

• 500

• 750

• 1000

How does dividing by 10 affect a decimal number?

• It shifts the decimal point one place to the left.

• It shifts the decimal point one place to the right.

• It doubles the value of the number.

• It has no effect on the number.

What is the general rule for multiplying by powers of 10?

• Move the decimal point to the left for positive exponents.

• Move the decimal point to the right for positive exponents.

• Add the exponents together when multiplying.

• Multiply the number by 10 for each exponent.

What is the result of dividing 17.8 by 10?

• 1.58

• 1.68

• 1.78

• 1.88

How do you multiply a decimal number by 100?

• Move the decimal point two places to the left.

• Move the decimal point two places to the right.

• Add two zeros to the end of the number.

• Multiply the number by 10 twice.

How do you multiply a number by 10,000?

• Move the decimal point four places to the left.

• Add four zeros to the number.

• Move the decimal point four places to the right.

• Multiply the number by 100 and then by 100 again.

How does multiplying by 10 affect a whole number?

• It adds 10 to the number.

• It shifts all digits one place to the left.

• It divides the number by 10.

• It leaves the number unchanged.

What is the value of 43.2 multiplied by 1,000?

• 43,000

• 43,200

• 42,300

• 44,200

Explain the concept of powers of 10 in multiplication.

• Powers of 10 represent how many places to move the decimal point when multiplying.

• Powers of 10 are used to indicate the number of digits in a number.

• Powers of 10 are only applicable in addition and subtraction.

• Powers of 10 are irrelevant in multiplication.