Question

Help with two fractions, I'm not sure how to solve them...

Answer 1

The -(-) sign throws me off since I was told that then it'd become positive. Does this mean that now the problem is: -13/20 + 5/12

Answer 2

-13/20 - (-3/12) the subtraction sign and the -3/12 cancels and becomes a addition sign which will give you this -13/20+3/12 which is equal to -2/5

Answer 3

@Ashja

Answer 4

basically what what you said above my first message was correct

Answer 5

Ok!

Answer 6

please note the typo in msell 's post

you want to do -13/20 - (-5/12)

Answer 7

Would it look something like this:
-13/20+3/12
12: 12, 24, 48, 60
20: 20, 40, 60
-13/20 * 4/4 = -52/60
3/12 * 3/3 = 9/60
-52/60 + 9/60 = - 43/60 ?

Answer 8

-13/20 * 4/4 = -52/60
you want the bottom to be 60. 3*20 is 60 (NOT 4*20)
but you have the right idea, but wrong numbers

Answer 9

You're right, I mixed them up

Answer 10

-13/20+3/12
12: 12, 24, 48, 60
20: 20, 40, 60
-13/20 * 3/3 = -39/60
3/12 * 4/4 = 12/60
-39/60 + 12/60 = - 27/60 ?

Answer 11

jk, -9/20

Answer 12

First, isn't the problem
-13/20 - (-5/12) or

-13/20 + 5/12

you are doing -13/20+3/12 ( with a 3/12 and not 5/12)

second, 4*12 is 48. you want 5*12

Answer 13

Ok, I see that dumb typo I made. But other than that, do I have the method down?

Answer 14

except you think 3/12 * 4/4 = 12/60
the top is ok 3*4 = 12
the bottom is 12*4= 48
you really want to multiply top and bottom by 5

most people memorize the multiplication table

Answer 15

Gotcha, thank you so much for the help! :)

Answer 16

And a thumbs down to @msellier for confusing me :(

Answer 17

sorry

Answer 18

did it wrong i addmit but otherwise you got the answer and that all it matters mistakes happen