Read The Progressive Mental Arithmetic, Vol. 2 (Classic Reprint) - John B Gifford | ePub Online

Excerpt from The Progressive Mental Arithmetic, Vol. 2IN his school work the author has felt the want of available exercises in mental arithmetic which would make for power to deal Off hand with number problems such as are met with out Of school. Conference with other school workers has shown that this feeling is shared by many. The progressive mental arithmetic is the