Math Homework Challenge?

Question

This is for you. If you do all of these problems, & tell me how you got your answer & your answer is correct, [You do not have to show your work on every single on of them.. Just MOST of them] & I will give you 10 points... (:

1. 3/10 + 1/2

2. 2/3 + 3/4

3. 7/9 -5/12

4. 9/10 - 2/5

5. 12 4/5 +8 5/6

6. 9 5/6 + 7 2/9

7. 6 1/3 - 2 3/4

8. 15 3/4 - 9 11/12

BEST ANSWERS RECEIVE 10 PINTS WITH THE DIRECTIONS ABOVE!!

Answer 1

1. 4/5

2. 17/12

3. 13/36

4. 1/2

5. 64/5 + 47/6 = 619/30

6. 59/6 + 65/9 = 203/6

7. 19/3 - 11/4 = 43/12

8. 63/4 - 119/12 =35/6

its simple math =] there isnt much math to be shown.

Answer 2

I used my calculator =|

1. 4/5

2. 1 5/12

3. 13/36

4. 1/2

5. 21 19/30

6. 17 1/18

7. 3 7/12

8. 5 5/6

Answer 3

1. 1/2 is the same as 5/10, and 3/10 + 5/10=8/10,which simplifies to 4/5

2.the least common multiple of 3 and 4 is 12, so 2/3=8/12 and

3/4=9/12 and 8/12 + 9/12=17/12,which simplifies to 1 5/12

3.the least common multiple of 9 and 12 is 36, so 7/9=28/36 and 5/12=15/36 and 28/36-15/36=13/36

4.2/5 is the same as 4/10, so 9/10-4/10=510 which simplifies to 1/2

5.the least common multiple of 5 and 6 id 30 and 4/5=24/30 and 5/6=25/30,so 12 24/30+ 8 25/30=20 49/30,which simplifies to 21 19/30

6.the least common multiple of 6 and 9 is 18, so 5/6=15/18 and 2/9=4/18 and 9 15/18+7 4/18=16 19/18,which simplifies to 17 1/8

7.the least common multiple of 3 and 4 is 12, so 1/3=4/12 and 3/4=9/12 and 6 4/12-2 9/12,you need to carry, so 5 16/12-2 9/12=3 7/12

8.3/4 is the same as 9/12,so 15 9/12-9 11/12,you need to carry, so 14 21/12-9 11/12=5 10/12,which simplifies to 5 5/6