add a rational number 5/-6 and 2/3. The answer will be 1/78
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Step-by-step explanation:
-5/8 and 3/8
= -5/8 + 3/8 (∵ Denominators are same, ∴ LCM = 8)
= (-5 + 3)/8
= -2/8 = -1/4
Which is a rational number.
(ii) -8/13 and -4/13
= -8/13 + (-4/13) (∵LCM of 13 and 13 = 13)
= (-8 -4)/13 = -12/13
Which is a rational number.
(iii) 6/11 and -9/11
= 6/11 + (-9/11) (∵ Denominators are same, ∴ LCM = 11)
= (6 – 9)/11 = -3/11
Which is a rational number.
(iv) 5/-26 and 8/39
= 5/-26 + 8/39
= (-5 × 3)/26 × 3 + (8 × 2)/39 × 2
∵ LCM of 26 and 39 = 2 × 3 × 13 = 78
= (-15 + 16)/78
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