tolong jawab no 5-8 dan harus proses

5)
117 + 323 + (-427)
= 117 + 323 - 427
= 440 - 427
= 13

6)
15 × 11 × (-20)
= 165 × (-20)
= -3.300

7)
55 × 5 × 10
= 275 × 10
= 2.750

8)
28 × (-10) × 20
= -280 × 20
= -5.600