4. -8
5. 24
6. I can't see it properly so if it's ÷ answer is 9 if it's - answer is -70
He walks 7,300 miles in 1 year
One way to approach this would be to express 125^2 as (125)(125).
Note also that 125^(4^3) = 125^(1 + 1/3) = (125)(5)
Therefore, the given expression boils down to
(125)(125) 125
--------------- = ------- = 25
5 (125) 5
There are other ways in which you could reduce the given expression.
- 5 + -3 = -8
hope this helps
when a negative number adds a negative number, it will be negative
when a negative number adds a positive number, whichever number (either positive or negative) take the sign of the bigger one
For example:
-4 + 3 = -1
-5 + 10 = 5
hope this helps
