Question

Resolva a expressão:

[-3/5+(1/2-1/4)]-[3/10+(-3/4-11/20)

Answer 1

[-3/5+(1/2-1/4)]-[3/10+(-3/4-11/20)]

[-3/5+(2-1)/4]-[3/10+(-15-11)/20)]

[-3/5+1/4]-[(3/10-26)/20)] ==> [(-12+5)/4]-[(6-26)/20]

 [ - 7/4]-[(-20)/20] ==>  - 7/4 + 1 ==> - 7+4 ==> - 3
                                                              4             4