In assembling her bookshelves, Keri finds that she needs a bolt that'll reach through 5/8 inch wood, a1/8 inch thick washer, & a 1/4 inch thick nut. How long must the bolt be?

5/8 + 1/8 + 2/8 = _______ inch

To determine the length of the bolt, we need to add the thickness of the wood, the washer, and the nut.

Given:
Thickness of the wood = 5/8 inch
Thickness of the washer = 1/8 inch
Thickness of the nut = 1/4 inch

To find the total length, we add these measurements together:

5/8 inch + 1/8 inch + 1/4 inch = 5/8 + 1/8 + 2/8 = 8/8 inch = 1 inch

Therefore, the bolt must be 1 inch long to reach through the 5/8 inch wood, a 1/8 inch thick washer, and a 1/4 inch thick nut.