Add: a) 2/9+(-3/9) b) 4/7+(6/7) c) 2/5+3/7 d) 3/8+4/3+2/7.
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Answer:
(a) 2/9 +(-3/9)
= 2/9 - 3/9
= -1/9 ans.
(b) 4/7 + 6/7
= 10/7 ans.
(c)2/5 + 3/7
= 19/35 ans.
(d) 3/8 + 4/3 +2/7
= 335/168 ans.
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