Jack bought 5 / text{ pounds}5 pounds5, start text, space, p, o, u, n, d, s, end text of Halloween candy. He gave out 3/text{ pounds}3 pounds3, start text, space, p, o, u, n, d, s, end text of the candy to trick or treaters and ate 10/text{ ounces}10 ounces10, start text, space, o, u, n, c, e, s, end text of the candy.

1.375 pounds

Step-by-step explanation:

We want to find how many pounds of candy he has left.

He bought 5 pounds.

He gave out 3 pounds.

He ate 10 ounces. Converting 10 ounces to pounds:

1 ounce = 0.0625 pounds

10 ounces = 10 * 0.0625 = 0.625 pounds

Therefore the amount of candy he has left is:

5 - (3 + 0.625)

= 5 - (3.625)

= 1.375 pounds