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- First Lessons in Arithmetic. Lesson XXXIV - exerci...
- First Lessons in Arithmetic. Lesson XXV - Subtract...
- First Lessons in Arithmetic. Lesson XXXII. - Intro...
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- First lessons in Arithmetic: Lesson XXX. - Readin...
- First Lessons in Arithmetic. Lesson XXIX - countin...
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- Mental addition and subtraction games
- First lessons of Arithmetic: Lesson XXIV. - addit...
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