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Add the rational numbers $− 9 24$ and $− 1 18$ . The answer is:

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− 31 71

− 31 72

− 31 73

− 31 74

answer is B.

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Detailed Solution

Given 2 rational numbers

− 9 24

and

− 1 18

.
L.C.M of 24 and 18 = 72.
Making the denominator 72 of both rational numbers,

= − 9 × 3 24 × 3 and − 1 × 4 18 × 4 = − 27 72 and − 4 72

Now adding both,

= − 27 72 + − 4 72 = − 27 − 4 72 = − 31 72

The answer is

− 31 72

.
Hence, option 2 is correct.

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