Question

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 cost of the bottles of juice. Which method can Justin use to find the product of $1.15 and 10? (1 point)
• 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.
• 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.
• 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.
• 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.

Answer 1

To find the product of $1.15 and 10, Justin can simply multiply the number by 10. When multiplying by 10, the decimal point moves one place to the right. Therefore, the correct answer is:

• 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.