Question

please tell me I will give you brainlest mark​

Answer 1

Answer:

Step-by-step explanation:

1. 3/7+(-6/11)+(-8/21)+5/22

= 3/7-6/11-8/21+5/22

= $\frac{3}{7} - \frac{8}{21} + \frac{5}{22} -\frac{6}{11}$

= $\frac{(3*3)-(8*1)}{21} +\frac{(5*1)-(6*2)}{22}$

= $\frac{9-8}{21} +\frac{5-12}{22}$

= $\frac{1}{21} +\frac{-7}{22}$

= $\frac{(1*22)-(7*21)}{21*22}$

= $\frac{22-147}{462\\}$

= $\frac{-125}{462}$

2. -4/5 ×3/7×15/6×-14/9

$= \frac{-12}{35}$ × $\frac{-210}{54}$

$=\frac{2520}{1890}$

= $\frac{252}{189}$

= $\frac{4}{3\\}$

3. (9/6*3/12) + (9/16*(-3/9))

$=\frac{9}{16} * \frac{1}{3} - \frac{9}{16} * \frac{1}{3}$

= 0

4. 2/5*(-3/7) -1/14 -3/7 *3/5

= -1/2

5. Ans :- 2

6. Ans :- -11/28

7. Ans :- 271/80

I Hope This helped you . first few sums are given try the remaining with answers given above . plzz mark this answer as brainlliest and like it .....