Question

li needs 15 pieces of string each 1/2 of a inch long. she cut a 6-inch piece of string long . how many more pieces of string does she need ?

Answer 1

15 pieces times 0.5 equals 7.5 inches. 7.5 in-6in= 1.5 inches. 1.5 inches/0.5 inches= 3 pieces. She would need 3 more pieces.

Answer 2

Answer: 3 pieces of string.

Explanation:

Given: Li needs 15 pieces of string each 1/2 inch long.

Thus, total string required by Li
`=15*(1)/(2)\text{inch}=7.5\text{inches}`

As she cut a 6-inch piece of string .

So the length of string she needs
`=7.5-6=1.5`

Since, each piece of string has length 1/2 inch or 0.5 inch, then the number of pieces she need
`=(1.5)/(0.5)=3`

Hence, she need 3 pieces of string.