For example, the subject by himself reaches this verbal expression aquot;let the amount of first-grade cotton is x, aquot; and as a result the ... of first-grade cotton and x are united by this aquot;periodicaquot; association throughout the rest of the problema#39;s solution. 7.

Title | : | Soviet Studies in the Psychology of Learning and Teaching Mathematics: Problem solving in arithmetic and algebra |

Author | : | Izaak Wirszup, School Mathematics Study Group |

Publisher | : | - 1969 |

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