anonymous 4 years ago what is 7/9- 5/12?

1. RagingSquirrel

2. anonymous

k help????

3. RagingSquirrel

13/36

4. anonymous

5. RagingSquirrel

Yep.

6. anonymous

i have another

7. RagingSquirrel

8. anonymous

wat is the least common denominator of 5/12 and 7/18

9. RagingSquirrel

do you want an explanation or just an answer?

10. anonymous

36

11. anonymous

12. anonymous

to figure this out we should find a common divisor. to do this, we should multiply the left fraction by 1 in the form of the divisor of the right fraction and the right fraction by 1 in the form of the divisor of the left fraction. Sounds wordy but its like this: $\frac{12}{12}\times\frac{7}{9}-\frac{9}{9}\times\frac{5}{12}$after this we have everything in terms of the same base, and we can write it like this: $\frac{84-45}{108}=\frac{39}{108}$which reduces down to 13/36

13. anonymous

yeah it's the lowest number that is divisible b both 18 and 12

14. RagingSquirrel

haha... i knew junkie was typing up something big

15. anonymous

It's what I do :)

16. anonymous

another

17. anonymous

change to a mix number 145/14

18. RagingSquirrel

you sure you dont want me to explain?

19. anonymous

14 5/14

20. anonymous

10 5/14*

21. anonymous

22. anonymous

the second

23. RagingSquirrel

lol i was like... whaaa?

24. anonymous

another

25. anonymous

are you sure you're learning through this?

26. anonymous

7 and 1/5 divided by 1 and 1/5

27. anonymous

28. RagingSquirrel

6.

29. anonymous

30. RagingSquirrel

yeah.

31. anonymous

36/5//6/5 =6

32. RagingSquirrel

hey, dont forget to click "good answer". It would really help me out.

33. anonymous

same

34. RagingSquirrel

Thanks! Leveled up to 16.

35. anonymous

thanks

36. anonymous

ok now i have another

37. RagingSquirrel

shoot

38. anonymous

evaluate using the correct order of operations for 1/4 3/8 and 5/6

39. anonymous

sorry im not too good with math

40. anonymous

are you supposed to add them?

41. anonymous

it just says evaluate using the correct order of operations

42. RagingSquirrel

order of operations can be abbreviated PEMDAs. In 5th grade i didnt think it would help that much, but it did. Parentheses Equations Multiplication Division Addition

43. anonymous

my bad i gave u the wrong one

44. anonymous

ahaha..

45. anonymous

its find the least common denominator

46. anonymous

24

47. anonymous

the lowest number divisible by 4 6 and 8 is 24

48. RagingSquirrel

that.... makes sense

49. anonymous

ok now wat is 7/8 divided by 5/11

50. RagingSquirrel

one sec.

51. RagingSquirrel

1 37/40

52. anonymous

how did u get that?

53. anonymous

i could be wrong, but this is what i got. ( 7 / 9) - (5 / 12) = 0.361111111

54. RagingSquirrel

turn the second numbers around. then you simply multiply

55. anonymous

woah hold on here i can do that

56. RagingSquirrel

57. anonymous

7/8//5/11=7/8*11/5=77/40

58. anonymous

what is 18 and 6/7 minus 13 and 13/14

59. RagingSquirrel
60. anonymous

61. anonymous

omg thank you so much!!!!!!

62. RagingSquirrel

63. anonymous

i tried lookifind anyng for so many i couldnt

64. anonymous

i tried looking i couldnt find any

65. anonymous

i need help with one more

66. RagingSquirrel

67. anonymous

[ 1/2+ 1/3)\times7/5

68. RagingSquirrel

remember. PEDMAS.

69. anonymous

i got confused with this one

70. RagingSquirrel

This is order of operations.

71. RagingSquirrel

72. RagingSquirrel

the ( ) s are parentheses. So we handle them first.

73. RagingSquirrel

1/2 + 1/3 = 5/6. So we can simplify down to 5/6 times 7/5

74. RagingSquirrel

Theres no equations, so we go to multiplication.

75. RagingSquirrel

5/6 Times 7/5 is 2 and 7/30. So theres your answer. 2 7/30

76. anonymous

reduce 14 1/24