Question

please help me fast​

Answer 1

Answer:

1) since it is addition we will subtract both numbers

-5/21+13/14

The lcm of 21 and 14 is 294

so

multiply by both numerator and denominator

= -5/21 *14

13/14*21

=- -70/294 and 263/294

= 233/294 - -70/294

= negative + positive = subtract both no

=403/294

2) -2= -2/1

= same as the 1st question, subtract

= 7/8 and -2/1

=lcm of 2 and 8 is8 itself

so -2/1*8 =16/8

= 7/8*1= 16/8-7/8

THEREFORE THE ANSWER IS 9/8