Question

Add the following rational numbers -13/8 and 12/-5

Answer 1

Answer:

$\frac{ - 13}{8} + \frac{12}{ - 5} \\ \frac{ - 13 \times 5 - 12 \times 8}{40} \\ \frac{ - 65 - 96}{40} \\ \frac{ - 161}{40}$

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Answer 2

LCM of -13/8 and 12/-5 i.e LCM of 8 and -5 is 40

so,-13/8×5/5=-65/40

12/-5×-8/-8=-96/40

now the denominator of both the rationals is the same i.e 40

so-65/40+-96/40=--161/40

therefore the answer to this question is -161/40.

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