Question

Resolva a soma e a subtração dos números racionais.

a) (+13) + (−14) =

b) (−2,3) + (−4,5) =

c) (−23) − (−35) =


d)12− [(−23) + (+34)] − [−2 + (+34)] =



e) (+3,4) − (+1,8) =

Answer 1

Resposta:

a: -1

b: -6,8

c: 12

d: 37

e: 1,6

Explicação passo-a-passo:

Answer 2

Resposta:

a) (+13) + (−14) = -1

b) (−2,3) + (−4,5) = -34/

5

= -6 4/

5

= -6.8

c) (−23) − (−35) =12/1 = 12

d)12− [(−23) + (+34)] − [−2 + (+34)] = -31/1 = -31

e) (+3,4) − (+1,8) =8/

5

= 1 3/

5

= 1.6