Question

please answer by steps
Q.NO 6 one

Answer 1

Answer:

$\frac{ - 5}{6} \times \frac{5}{7} - \frac{1}{2} \times \frac{4}{5} - \frac{1}{12} \times \frac{5}{7} \\ = \frac{ - 25}{42} - \frac{4}{10} - \frac{5}{84} \\ lcm = 420 \: so \: \\ = \frac{ - 250 - 168 - 25}{420} \\ = \frac{ - 443}{420}$

Answer 2

Answer:

-1.05

Step-by-step explanation:

We need to multiply the numerator with the numerator and denominator with the denominator -

$\frac{ - 5}{6} \times \frac{5}{7} - \frac{1}{2} \times \frac{4}{5} - \frac{1}{12} \times \frac{5}{7 } \\ = \frac{ - 25}{42} - \frac{4}{10} - \frac{5}{84}$

Now take the LCM of 42,10 and 84 which is 420, i.e, 420 is divisible by all these 3. Now the number by which you need to multiply the denominators to get 420, multiply the same number to their respective numerators. After that we can apply the arithmetic tools on the numerator taken on common denominator 420. So -

$\frac{ - 250 - 168 - 25}{420} \\ \\ = \frac{ - 443}{420}$

≈ -1.05