Answer:
-30.
Step-by-step explanation:
r - s - t
= -18 - 27 - (-15)
= -18 - 27 + 15
= -45 + 15
= -30.
Answer: -30
-18 -27 -(-15)
-18 -27 +15
-45 +15
-30
4.4 × 10 ^− 6
Brainliest please :)?