tolong jawab no 1-7 ya pke cara

1 C. -27, -21, -16, 18, 25
2 A. Penurunan suhu sebesar 280°C
3 -9 +(25 : (-5))- 2 x (-4)
= -9 + (-5) - (-8)
= -9 + (-5) + 8
= -9 + 3
= -6
4 (-35 : 7 ) - (-6 x 4 )
= -5 - (-24)
= -5 + 24 = 19