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ریاضی را آسان بیاموزیم - جمع وتفریق کسر ها(کلاس اول)

ریاضی را حفظ نکنیم با تمرین کردن یاد بگیریم

جمع وتفریق کسر ها(کلاس اول)

نویسنده :رضا سازمند
تاریخ:یکشنبه 18 مهر 1389-03:38 ب.ظ

جمع وتفریق کسر ها:

زمانی می توانیم کسر ها را با هم جمع یا از هم کم کنیم که مخرج ها

برابر باشند،در غیر اینصورت باید ابتدا مخرج مشترک بین آنها را بدست آورد

سپس با توجه به تساوی کسر ها صورت ها را نیز تغییر داده وبعد حاصل

جمع یا تفریق را بدست می آوریم.




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