Summer

ONE summer doing sums
Another adder comes
Eve's evil suitor
Adam's Apple computer
Duplicity injecting
That from Thou bisecting
Sly slide rule gliding
Subtly dividing
Beneficent sumONE
Venomous TWOsum
Fat tally double
Additive trouble
Fullsum amount
Call to a count
Where all is ONE
TWO large a sum
Summery summation
Sum consummation