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'''''Addition and Subtraction 3''''' is an educational title developed by [[:Category:Scott Foresman|Scott Foresman Electronic Publishing]] for the TI-99/4A home computer system. It was released during the first quarter of 1984 and originally retailed for $22.95(USD). It was developed and programmed by [[Thomas Hartsig]]. Addition and Subtraction 3 can take advantage of the optional speech synthesizer add-on and enhance the activities with human-like speech.

Addition and Subtraction 3 is an exciting way to practice mathematics. The module uses color, sound, music, and animation to bring math alive. The practice exercises challenge your child, and at the same time make learning fun. You can be confident that this module was carefully designed to provide a solid foundation in essential ma the ma tics mathematics skills.