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تهدف الدراسة إلى التعرف على اثر استخدام الألغاز الرياضياتية في تنمية الحس العددي في مقرر الرياضيات لدى تلميذات الصف الرابع الابتدائي بمدينه الليث، وتكونت عينة الدراسة من تلميذات الصف الرابع الابتدائي بمدينة الليث، وتم قسيمها إلى مجموعين إحداهما تجريبية (31) تلميذة درست باستخدام الألغاز الرياضية في وحدتي الكسور العشرية وجمع الكسور العشرية، والأخرى (31) تلميذة درست بالطريقة المعتادة، وقد أخضعت مجموعتا الدراسة لاختبار الحس العددي المعد من قبل الباحثة، حيث تم تطبيقه قبليا وبعديا بعد ضبطه والتأكد من صدقه، وثباته، وفي ضوء أبعاد الدراسة ومتغيراتها وضعت الدارسة اربع فروض للدراسة طبقت على وحدتي (الكسور العشرية - جمع الكسور العشرية) وأظهرت النتيجة العامة للدراسة: الأثر الإيجابي للألغاز الرياضية في تنمية الحس العددي بمقرر الرياضيات لدى تلميذات الصف الرابع الابتدائي بمدينه الليث، وتوصلت الباحثة للمجموعة من التوصيات جاء من أهمها، عقد دورات تدريبية لمعلمات الرياضيات أثناء الخدمة على كيفية التدريس باستخدام الألغاز الرياضية، وكيفية صياغة الألغاز الرياضية بهدف التفاعل الصفي.
The study aimed to investigate the effect of using mathematical puzzles in the development of a sense of numerical in the Course of Mathematics on the pupils in the fourth grade at the city of AlLaith. The study was conducted on a total sample of the fourth grade pupils of the city of AlLaith, which divided into two groups, one experimental (31) taught with mathematical puzzles in two decimals and decimals collection, while the other (31) taught with the normal way. The two groups of the study conducted a (pre - post) numerical sense test prepared by the researcher which has been applied after adjusting, and ensuring its reliability and stability. Then and based on the study aspects and variables. the researcher placed four hypotheses of the study applied to the unit of (decimals - collection decimals). 1-N o statistically significant differences in the significance level (0.05) between the mean scores of pupils at the experimental group and their peers at the control group in the skill of finding a quantum absolute and relative .number after the pre adjusting. 2. No statistically significant differences at the level (0.05) between the mean scores of students at the experimental group and their peers at the control group in the skill of finding this relative effect of operations on numbers. After the pre adjusting. 3. No statistically significant differences at the level (0.05) between the mean scores of pupils at the experimental group and their peers at the control group in the skill of Identify and use numerical distinctive mark. After the pre adjusting. 4. No statistically significant differences at the level (0.05) between the mean scores of students at the experimental group and their peers at the control group at mental computation skills and a rough estimate After the pre adjusting. Statically, and as Analysis of Covariance (ANACOVA) has been applied, the study resulted in: There were statistically significant differences in the significance level (0.05) between the mean scores of pupils at the experimental group and their peers at the control group in the skill of (finding a quantum absolute and relative number, finding the relative effect of operations on numbers, Identify and use numerical distinctive mark, mental computation skills and a rough estimate). The overall results of the study Showed the positive effect of mathematical Puzzles in the Development of a Numerical Sense in the Course of Mathematic on the Fourth Grade pupils at The City of AlLaith. Based on the results of the study, the researcher recommended a set of recommendations came from the most important: Providing training courses for in-service teachers of mathematics on teaching how to use mathematical puzzles ,and how to formulate a mathematical puzzles in order to Stimulate classroom interaction.
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