Abstract: Objective: Stress, psychological distress and fatigue are frequently co-morbid experiences, but the nature of any temporal and/or causal relationships is unclear. This study examined possible mediators and moderators of the stress/psychological distress â fatigue relationship in a non-clinical sample.bstract: Objective: Stress, psychological distress and fatigue are frequently co-morbid experiences, but the nature of any temporal and/or causal relationships is unclear. This study examined possible mediators and moderators of the stress/psychological distress â fatigue relationship in a non-clinical sample.
One of the properties of quantities with exponents is that numbers with exponents can be added and subtracted only when they have the same base and exponent. Since all numbers in scientific notation have the same base (10), we need only worry about the exponents.
Here are the steps to adding or subtracting numbers in scientific notation 1  : Determine the number by which to increase the smaller exponent by so it is equal to the larger exponent. 2  Increase the smaller exponent by this number and move the decimal point of the number with the smaller exponent to the left the same number of places. Add or subtract the new coefficients. If the answer is not in scientific notation (i.e. if the coefficient is not between 1 and 10 ) convert it to scientific notation.