D. (1/5)+(-2/3) e. (-11)+7+(-2) +3 f. 18+ (-4) + (-13)+(-9)​

Penjelasan dengan langkah-langkah:

d.(1/5) + (-2/3)

= 1/5 – 2/3

= 3/15 – 10/15

= -7/15

e. (-11) + 7 + (-2) + 3

= -4 – 2 + 3

= -6 + 3

= -3

f. 18 + (-4) + (-13) + (-9)

= 18 – 4 – 13 – 9

= -8