Experiences in mathematical discovery
Vol.1. Formulas, graphs and patterns -- v.2. Properties of operations with numbers -- v.3. Mathematical sentences -- v.4. Geometry -- v.5. Arrangements and selections -- v.6. Mathematical thinking -- v.7. Rational numbers -- v.8. Decimals, ratios, percents -- v.9. Positive and negative numbers -- v....
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Washington, D.C. : National Council of Teachers of Mathematics,
1966
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