Question

Efetue
(-7a/2)+(+1a/4)
(+2m)+(3/4m)
(2/5m)-(2/3m)
(1a/2)+(1a/3)

Answer 1

a) -13a/4

  -7a/2 + 1a/4
   (-14a+1a)/4
    -13a/4

b) 11m/3

  2m+3m/4 = 11m/3

c) -4m/15
 
  2m/5 - 2m/3 = -4m/15 

d) 5a/6
 
 1a/2 + 1a/3 = 5a/6

Espero ter ajudado ^-^