Reys, B., Barger, R., & Kroll, D. L. (1991). Developing number sense in the middle grades. Reston Va.: National Council of Teachers of Mathematics.
Chicago Stili AlıntıReys, Barbara, Rita Barger, and Diana Lambdin Kroll. Developing Number Sense in the Middle Grades. Reston Va.: National Council of Teachers of Mathematics, 1991.
MLA AlıntıReys, Barbara, Rita Barger, and Diana Lambdin Kroll. Developing Number Sense in the Middle Grades. Reston Va.: National Council of Teachers of Mathematics, 1991.
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