For the first one, you just need to divide the amount of feet by 3 to get the amount of yards (there are three feet in a yard).
1431 / 3 = 476 2/3
The 102nd floor of the Sears Tower is 476 2/3 yards from the ground.
Second, you just need to multiply the amount of centimeters by 10 (there are 10 millimeters in a centimeter).
16 * 10 = 160
The butterfly has a wingspan of 160mm.
Third, the measurements are indeed 7. = 8. = 9. < 10. > 11. > 12. =
Fourth, you just need to know your conversion factors. 1. There are 3 feet in a yard. 42 / 3 = 14 yards 2. There are 1000 meters in a kilometer. 2350 / 1000 = 2.35 km 3. 12 inches in a foot. 18 * 12 = 216 inches 4. 10 decimeters in a meter. 289 * 10 = 2890 dm 5. 1760 yards in a mile. 1760 * 5 = 8800 yds 6. 10 millimeters in a centimeter. 35 * 10 = 350 mm
