Question

help me urgently please please please please please please please please please please please please please please please please please please please please please please please please​

Answer 1

Halloo mate

Here is your solution

1) Here ,

   ( 3/4 + -2/5 ) + -7/10 = 3/4 + ( -2/5 + -7/10 )

 = ( 3/4 - 2/5 ) -7/10 = 3/4 + ( -2/5 - 7/10 )

 = (15 - 8 )/20 -7/10 = 3/4 + (-4 -7)/10

 = 7/20 - 7/10 = 3/4 - 11/10

 = 7-14/20 = 15-22/20

 = -7/20 = 7/20

∴ LHS ≠ RHS

2) Here,

( -7/11 + 2/5 ) + -13/22 = 7/11 + ( 2/-5 + 13/22 )

= (-7/11 + 2/5) - 13/22 = 7/11 + (-2/5 + 13/22)

= (-35-32)/55 - 13/22 = (35 + 22)/55 + 13/22

= -57/55 - 13/22 = 57/55 + 13/22

= -114 - 65/110 = 114 + 65/110

= -179/110 = 179/110

∴ LHS ≠ RHS

3) Here ,

-1 + (-2/3 + -3/4 ) = ( -1 + -2/3 ) + -3/4

= -1 + ( -2/3 - 3/4 ) = (-1 - 2/3) -3/4

= -1 + ( -8 - 9 )/12 = (-3 -2)/3 -3/4

= -1 - 17/12 = -5/3 - 3/4

= -12 -17/12 = -20 -9/12

= -29/12 = -29/12

∴ LHS = RHS

HOPE IT HELPS !

If it helps please mark it brainliest .

Answer 2

Answer:

I am putting this answer just so that you can mark  DonaSharmahidanz's answer as brainiest