10-9 = 1/109 = 0.000000001
9 to negative 2 = 1/9 to plus 2 = 1/81
91
1 over 3 to the negative 2nd power is 9
1 everything to the power of 0 = 1
10-9 = 1/109 = 0.000000001
10-9 = 1/109 = 0.000000001
9 times 10 to the power negative 1
1/9
Negative 9 to the negative 2nd power (-9-2) = 0.012345679 (repeating).
-9
The sum of -9 and -1 is -10.
9 to negative 2 = 1/9 to plus 2 = 1/81
When you add -9 and +10, you get (+) 1.
19
91
1