A carpenter is making a table that will be 45 inches wide. He is gluing boards together. Each board 3¾ inches wide. How many boards does the carpenter need make the table?

3 3/4 inches are equivalent to 3.75 inches:3 3/4 = 3.75. Divide 45 inches by 3.75 to see how many boards are needed: 45 / 3.75 = 12. To check: 3.75 x 12 = 45 inches. So, 12 boards are needed.