Subject search: "Mental Arithmetic"
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小学生がたった1日で19₉19までかんぺきに暗算できる本小学生がたった1日で19₉19までかんぺきに暗算できる本, Book
by 小杉拓也, author • Kosugi, TakuyaShōgakusei ga tatta ichinichi de jūkyū kakeru jūkyū made kanpeki ni anzan dekiru honShōgakusei ga tatta ichinichi de jūkyū kakeru jūkyū made kanpeki ni anzan dekiru hon- 4.15 out of 5 stars
Speed MathematicsSpeed Mathematics, BookSecret Skills for Quick Calculation
by Handley, Bill - 4.25 out of 5 stars
ArithmetricksArithmetricks, Book50 Easy Ways to Add, Subtract, Multiply, and Divide Without A Calculator
by Julius, Edward H.
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