Justin wants to buy 10 bottles of juice to share with his family. The juice costs $1.15 per bottle. Justin wants to multiply $1.15 by 10 to find the total costs of the bottles of juice. Which method can Justin use to find the product of $1.15 and 10?

Question

A. He knows that 10 is 10 to the power of 1, so he needs to move the decimal point in 1.15 one place to the left.

B. He knows that 10 is 10 to the power of 2, so he needs to move the decimal point in 1.15 two places to the left.

C. He knows that 10 is 10 to the power of 2, so he needs to move the decimal point in 1.15 two places to the right.

D. He knows that 10 is 10 to the power of 1, so he needs to move the decimal point in 1.15 one place to the right.

Answer 1

To find the product of $1.15 and 10, Justin can use multiplication. When multiplying by 10, you shift the decimal point one place to the right.

So, the correct method is:

D. He knows that 10 is 10 to the power of 1, so he needs to move the decimal point in 1.15 one place to the right.

Thus, $1.15 multiplied by 10 equals $11.50.