1.subtract: 6 2/5 - 4 7/10. a. 1 7/10. b. 2 3/10. c. 2 7/10. d. 1 1/2.

2. find the least common multiple of 18,24,27.a. 1. b. 72. c. 216. d. 36.

3. subtract: 9 - 3 4/7. a. 6 4/7. b. 6 3/7. c. 5 4/7. d. 5 3/7.

4.find the least common multiple of 28,12,14,21. a. 336. b. 12. c. 21. d. 84.

5.subtract: 7/8 - 1/6. a. 17/24. b. 3. c. 1/3. d. 25/24.

6.add: 4 1/2 +3 1/3 + 2 7/8. a. 9 3/8. b. 9 17/24. c. 10 3/8. d. 10 17/24.

show how you get to the answer would be great