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THE NEW ARITHMETIC
HAS GEOMETRY A PLACE IN GRADES SEVEN AND EIGHT?
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abbreviations algebra angles answer approximate computation approximate numbers arithmetic arranged cent child circle common fractions common-sense course cubic foot decimal fractions decimal point decimal system degrees demonstrational geometry Descartes develop digits divide divisor drawing drill eighth-grade elementary algebra equation experience feet figures formula give grade nine grades seven graph habit hammer idea illustration inches interest introduced junior high school kind long division mathe mathematics matics means measurements ment method metic mind mixed numbers multiplication and division nearest hundredth negative number ninth-grade number sense one-letter practical problems protractor pupil quadratic equations question ratio reason result rounded rule selling price seven and eight similar triangles simple situation slide rule solve square root step subtraction symbols teacher teaching tell things three-figure accuracy tion topic triangle trigonometry understanding whole number write