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The concept of "altogether" is expressed by the sign for TOTAL. This also means "sum," or "add everything up." 

TOTAL / sum up / altogether

 

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Sentence: ALTOGETHER, HOW-MANY SIGN YOU KNOW?

Note:  The above sentence relies on a lot of context (as if you were in an ASL class and had been talking about learning sign language).  In a low context situation a more clear way to ask the question above would be: 

DIFFERENT (shift) DIFFERENT SIGN  ALTOGETHER YOU KNOW HOW-MANY YOU?
 

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You can modify the sign ALTOGETHER to change it to mean "add to."
The non-dominant hand starts in a flattened "O"-hand stays stationary. The dominant hand "adds to it."

ADD-TO:

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Also see: ADD

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