ADD

• ___ fuel to the fire

• ___ insult to injury

• ___ man (calculating sort)

• ___ up to: amount to

• ___-ons

• 2 + 2, e.g.

• Affix

• Also mention

• Also say

• Annex

• Append

• Apply a rider

• Apply an abacus

• Arithmetic directive

• Arithmetic function

• Arrive at a total

• Attach

• Attach (to)

• Augment

• Bring numbers together

• Build (on)

• Bustle

• Calculate column totals

• Calculate sums

• Calculate the sum

• Calculate the total

• Cause an increase

• Check the check

• Chime in

• Chime in with

• Clap on

• Combine

• Combine in a sum

• Combine numbers

• Compute a total

• Compute, sometimes

• Confirm, as a friend on Facebook

• Connect

• Continue

• Contribute

• Contribute (to)

• Contribute to the conversation

• Contribute, as to the conversation

• Cookbook direction

• Count

• Count up

• Dipstick word

• Do 2+2

• Do a job for a summer?

• Do a summer's job

• Do a summer's work?

• Do arithmetic

• Do basic arithmetic

• Do basic math

• Do Chisanbop

• Do columns

• Do elementary-school homework

• Do footings

• Do numbers

• Do simple arithmetic

• Do simple math

• Do some basic math

• Do some math

• Do some math homework

• Do some simple calculating

• Do some sums

• Do sum thing?

• Do sum work

• Do sums

• Do the math

• Do the math, in a way

• Do the math, maybe

• Elaborate

• Engage in a summer activity?

• Explain further

• Extend

• Factor a sum

• Figure in

• Find a sum

• Find a total

• Find sums

• Find the bottom line

• Find the sum

• Foot the column

• Foot up

• For length of days, and long life, and peace, shall they ___

• Generate a summation

• Get a total

• Get sum?

• Get to the bottom line

• Get totaled

• Gibe, with up

• Go figure

• Go on

• Go on to say

• Have sum fun?

• Hit the + key

• Hook up with, on Facebook?

• Hyperactivity may be a sign of it, for short

• Impart

• Inability to stay focused, briefly

• Include

• Include, as a dash of cinnamon

• Include, with in

• Incorporate

• Increase

• Increase by

• Increase, with to

• Inject

• Insert a rider

• Interject

• It is often treated with Ritalin: Abbr.

• Just ___ water

• Just-water connection

• Keep score

• Keep talking

• Kick in

• Lack of focus, colloquially

• Lengthen (with to)

• Make a contribution

• Make a summation?

• Make sense, with up

• Make seven ones seven

• Make two ones two

• Mention as an afterthought

• Mix (in)

• Modern diagnosis for kids, for short

• Obey a plus sign

• Obey the plus sign

• Offer as a bonus

• Opposite of subtract

• Opposite of unfriend

• Parenthetically mention

• Perform an arithmetic operation

• Perform an certain operation

• Perform an operation?

• Possible diagnosis for an inattentive kid, briefly

• Postfix

• Problem in focusing, for short

• Put 2 and 2 together

• Put a wing (on)

• Put in

• Put in your two cents

• Put more in

• Put one's two cents in

• Put together

• Put together, in a way

• Put two and two together

• Put two and two together, e.g.

• Put two and two together, maybe

• Put two and two together, say

• Raise, with to

• Reason to prescribe Ritalin, briefly

• Recipe direction

• Recipe instruction

• Recipe verb

• Recipe word

• Ritalin target: abbr.

• Ritalin treats it: Abbr.

• Say a bit more

• Say further

• Say furthermore

• Say Furthermore..., say

• Say in a postscript

• Say more

• Solve some KenKen, say

• Speak further

• State further

• Stick (on)

• Stir in

• Subjoin

• Sum

• Sum (up)

• Sum things

• Sum up, father

• Supplement

• Supplement (with to)

• System of a Down song off Steal This Album!

• Tack (on)

• Tack on a few extra

• Tally

• Tally (up)

• Tally one's scorecard

• Tendency for one's mind to wander, for short

• The Lord shall ___ to me another son (Ge 30:24)

• Throw in

• Throw in at no extra cost

• Throw in there

• Throw into the mix

• Top off, say

• Toss in

• Toss into the bargain

• Toss into the mix

• Toss into the mix, e.g.

• Tot

• Total (up)

• Use +

• Use a calculator

• Use a plus sign

• Use a postscript

• Use an abacus

• Use an abacus, perhaps

• Use carets

• Utter parenthetically

• Verb used in recipes

• Violent Femmes ___ It Up

• Way to check the check

• What summers do

• What you must know how to do to solve a kakuro puzzle

• Word found on a dipstick

• Word heard in math class

• Word in math class

• Word near dipstick's end

• Word near the bottom of a dipstick

• Word on a dipstick

• Work on columns

• Work with a calculator

• Work with a calculator, in a way

• Work with numbers, in a way

• Write a P.S.

• Write a P.S., e.g.

• Write further

• Write in a postscript

• Write in a postscript, e.g.

• Write, as a P.S.

• A condition (mostly in boys) characterized by behavioral and learning disorders