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A self-paced subtraction "tutor" to help your child develop strong math skills to meet today's and tomorrow's challenges. Suitable for children from kindergarten through grade eight.
===Triton Spring 1984 Catalog===
Each of these ten famous programs provides painless drills in the basics. Children pace themselves, proceeding to more difficult levels only when ready . . . all the while experiencing color graphics and "reward" sound effects that keep them motivated. Grades Kindergarten-8.
===Manual===
