8/9-1/3=? 2/3+2/5=?
My teacher marked it wrong and I thought It was right
2007-06-16 00:44:21 · 8 answers · asked by nubian71 2 in Science & Mathematics ➔ Mathematics
8/9 - 1/3 = 5/9
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The common denominator is 9: multiply 1/3 top and bottom by 3 to get the common denominator 9:
8/9 - 1/3 =
8/9 - 1·3/3·3 =
8/9 - 3/9 =
(8 - 3) / 9 =
5/9
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2/3 + 2/5 = 16/15
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The common denominator is 3·5=15: multiply 2/3 top and bottom by 5 and 2/5 to and bottom by 3 to get the common denominator 15:
2/3 + 2/5 =
2·5/3·5 + 2·3/5·3 =
10/15 + 6/15 =
(10 + 6) / 15 =
16/15
(which can also be written as 1 1/15 )
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Hope this helps.
2007-06-16 00:48:55 · answer #1 · answered by M 6 · 7⤊ 3⤋
8/9 - 1/3 = 8/9 - 3/9 = 5/9
2/3 + 2/5 = 10/15 + 6/15 = 16/15 = 1 1/15
2007-06-16 08:09:10 · answer #2 · answered by detektibgapo 5 · 2⤊ 0⤋
8/9 - 1/3 =
8/9 - 3/9 =
5/9
- - - - - - -
2/3 + 2/5 =
10/15 + 6/15 =
16/15
- - - - - - -s-
2007-06-16 07:56:56 · answer #3 · answered by SAMUEL D 7 · 2⤊ 0⤋
8/9 - 1/3
Make a common denominator.
8/9 - 3/9 = 5/9
2/3 + 2/5 = 10/15 + 6/15 = 16/15
2007-06-16 07:49:15 · answer #4 · answered by Puggy 7 · 1⤊ 1⤋
8/9-1/3
=8/9-3/9
=(8-3)/9
=5/9
2/3+2/5
=10/15+6/15
=(10+6)/15
=16/15
=1 1/15
hope this helps!
2007-06-17 09:36:03 · answer #5 · answered by Amethyst Cherry W 3 · 1⤊ 0⤋
8/9-1/3=
8/9-3/9=
5/9
2/3+2/5=
10/15+6/15=16/15
=1/1/15
2007-06-16 07:55:15 · answer #6 · answered by Kuan T 2 · 2⤊ 1⤋
8/9-1/3=5/9
2/3+2/5=16/15=1and1/5
2007-06-16 07:49:01 · answer #7 · answered by drew2kew 2 · 2⤊ 2⤋
Don't know, refer to my dad. Alson
2007-06-16 07:50:15 · answer #8 · answered by queeniel 1 · 2⤊ 2⤋