Answer:
1. C) 4 ft
2. B) 3 yds
3. C) 15840 ft
4. D) 128 oz
5. A) 105 oz
Explanation:
For No. 1, to find how many feet, you can divide the number of inches by how many inches in a foot, or 12:
48/12 = 4 ft
For No. 2, to find how many yards, you would do the same. This time, there's 3 ft in a yard. You can also develop strategies for solving these. A ratio is a good way to visually see the problem:
3 ft 9 ft
----- = -----
1 yd ? yd
Cross multiply:
3 · ? = 9
? = 3
For No. 3, to find how many feet in 3 miles, first recall how many feet in 1 mile. That's 5280 ft.
We want 3 of those, so you would multiply it:
5280 · 3 = 5280 + 5280 + 5280
= 10560 + 5280
= 15840
For No. 4, you can use a ratio again:
16 oz ? oz
-------- = --------
1 lb 8 lb
Cross multiply:
16 (8) = ?
128 = ?
For No. 5, you can use the same ratio as No. 4:
16 oz ? oz
-------- = --------
1 lb 6.5 lb
Cross multiply:
16 (6 1/2) = ?
(16 · 6) + (16 · 1/2) = ?
96 + 8 = ?
104 = ?