determine first how much larger the exponent than the other smaller exponent
increase the smaller exponent by this number and move the decimal point of the smaller number to the left the same number of places
then add it now
if the answer is not in scientific form thn make it scientific
example.
1.14 x 10^2 + 5.4 x 10^3
^3-^2 =1
1.14 = 0.114x 10^3
0.114x10^3 + 5.4 x10^3 = 5.514x10^3
