Answer:
1- 
2- 1
3- -2
Step-by-step explanation:
1-
Add the numbers : 
Reduce the fraction with 5 : 
Solution : 
2-
Calculate the difference: 
Divide: 1
Solution: 1
3-
Subtract the numbers: 
Reduce the fraction : -2
Solution: -2
The answer is 5.777778 or 5.80 or 52 / 9 or 5 7/9 found by my calculator and decimal-fraction converter. MY ANSWER IS ACTUALLY CORRECT.
Answer:
0.027
Step-by-step explanation:

Question 1: When sediments and rocks are dropped at the end of the river.
Question 2: An earthquake.