find the sum: (a) 5/4+–11/4
(b)5/3+3/5
(c)–9/10+22/15
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Answer:
(a) -3/2
(b) 34/15
(c) 17/30
Step-by-step explanation:
(a) 5/4 + - 11/4
= 5/4 - 11/4 = -6/4 = -3/2
(b) 5/3 + 3/5
LCM = 15
5/3 = 5×5/3×5 = 25/15
3/5 = 3×3/5×3 = 9/15
Hence, 5/3 + 3/5 = 25/15+9/15 = 34/15
(c) LCM = 30
-9/10 = -27/30 (X3)
22/15 = 44/30(X2)
Hence, -9/10+22/15 = -27/30+44/30 = 17/30
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