Question

Evaluate : -7/10 - 13/15 + 27/20

Please ans with full explanation.​

Answer 1

Answer:

According to BODMAS

-7/10 - 13/15 + 27/20

So, firstly make LCM same that is 60

= -7× 6 - 13×4 + 27×3

60

= -42-52+81

60

= -13 Ans

60

Answer 2

Answer:

–13/60

Step-by-step explanation:

Given,

$- \frac{7}{10} - \frac{13}{15} + \frac{27}{20}$

Taking LCM of 10, 15, 20

10 = 2 × 5

15 = 3 × 5

20 = 2 × 2 × 5

So, LCM = 2 × 2 × 5 × 3 = 60

$\frac{ - 7 \times 6}{10 \times 6} - \frac{13 \times 4}{15 \times 4} + \frac{27 \times 3}{20 \times 3} \\ = \frac{ - 42 - 52 + 81}{60} = \frac{ - 13}{60}$

So, we evaluate the given expression as –13/60.

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