What is ...
-1/3+4/5 - 8/15
And how do you solve it?
2007-11-01 12:28:25 · 5 answers · asked by Sierra K 2 in Science & Mathematics ➔ Mathematics
-1/15
-5/15 + 12/15 - 8/15
2007-11-01 12:32:47 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Lowest common denominator - 15
Convert all to 15ths: 5/15 + 12/15 - 8/15 = 9/15 = 3/5
2007-11-01 19:33:43 · answer #2 · answered by Bacse 6 · 0⤊ 0⤋
Get a lcd
-1/3+4/5-8/15=
lcd is 15
-1/3=-5/15
+4/5=12/15
-8/15=-8/15
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-1/15
2007-11-01 19:37:28 · answer #3 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋
you need common denominators. so since 3, 5, and 15 are related. your common denominator is 15.
multiply -1\3 by 5\5 and 4\5 by 3\3 do some math, then add and subtract across, keeping 15 as the denominator in your answer.
2007-11-01 19:35:01 · answer #4 · answered by Ray E 5 · 0⤊ 0⤋
make everything have the same denom.
-5/15 + 12/15 - 8/15
7/15 - 8/15
- 1/15
2007-11-01 19:36:34 · answer #5 · answered by ........ 3 · 0⤊ 0⤋