Arithmetic dream meaning is explained below using 2 different sources. Each interpretation is shown with its source.

Interpretation 1 — Patrica Telesco

(see Calculator, Numbers)

The conscious, logical self in full swing.

Look to see if the mathematics make sense.

If not, check your current situation to see if things around you likewise don’t “add up.”

Someone with a designing, detailed personality.

Source: The Language of Dreams Author: Patrica Telesco

Interpretation 2 — Stearn Robinson - Tom Corbett

Dreams which involve doing problems predict petty annoyances you can solve with a little extra tactful effort See also Accounts*
Source: The Complete Guide to Interpreting Your Dreams Author: Stearn Robinson - Tom Corbett