Please answer
ill give you brainliest asap

Answer:
Look at bolded numbers
Step-by-step explanation:
1. 3-(-5)=3+5=8
2. -7-8=-7+(-8)=-15
3. -55-(-55)=-55+55=0
4. 10-15=10+(-15)=-5
5. 0-(-18)=0+18=18
++ makes a positive
+- makes a negative
-+ makes a negative
-- makes a positive