tolong jawab pertanyaan saya ini yg gak mau gak apa apa kok

2) 1 + (-2) + 3 + (-4) + 5 + (-6) + 9 + (-10)
= 1 - 2 + 3 - 4 + 5 - 6 + 9 - 10
= -1 + 3 - 4 + 5 - 6 + 9 - 10
= 2 - 4 + 5 - 6 + 9 - 10
= -2 + 5 - 6 + 9 - 10
= 3 - 6 + 9 - 10
= -3 + 9 - 10
= 6 - 10
= -4

3) 5°C - 12°C
= -7°C

4) 32°C - 15°C
= 17°C

5) 16°C - 25°C
= -9°C

semoga membantu^^