find the sum - 9 by 10 + 22 by15 of 7 th standard
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-9/10 + 22/15
take LCM of 10, 15 i.e 30
-9x3+22x2/30
-27+44/30
17/30 Ans
take LCM of 10, 15 i.e 30
-9x3+22x2/30
-27+44/30
17/30 Ans
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