tolong di jawab menggunakan caranya

Jawaban:
3.Suhu pendingin sekarang=(-3 - 15)°C.
=(-(3 + 15))°C.
=-18°C (A).
4.(6 + 7 - (-5)) + ((-9 + 11 - 3 + 6)=18 + 5.
=23 (D).
5.12 8/9 - 2 2/3 - 3 5/6=116/9 - 8/3 - 23/6.
=232/18 - 48/18 - 69/18.
=115/18.
=6 7/18 (D).