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幂的运算是学生由四则混合运算上升到指数运算的一次飞跃,幂的运算是整式运算的基础.北师大版的教材在七年级上册有理数的运算中安排了乘方运算,通过学习学生已经认识了乘方运算的结果叫作幂,知道了底数与指数的概念,掌握了幂的意义和运算.在七年级下册第一章整式的运算中又安排了与幂相关的四种运算,分别是同底数幂的乘法、幂的乘方、积的乘方和同底数幂的除法,这四种运算的学习将为整式的乘除运算奠定基础.这四种运算都与幂有关,也就是说四种运算是有本质联系的.在教学中就要紧紧抓住幂的意义推理每种运算的法则,使学生深刻理解每种运算
Exponentiation is a leap from four mixed arithmetic to exponentiation, and the arithmetic of power is the basis of integer arithmetic. Beijing Normal University textbook arranges the exponentiation in the seventh grade upper rational number arithmetic, Know the result of the power operation is called the power, we know the concept of the base and the index, mastered the power of the meaning and operation.In the seventh grade of the first chapter of the integer operation is arranged in the power of the four operations, They are the multiplication of the same base power, the power of the power, the power of the product, and the division of the power of the same floor, and the learning of these four operations will lay the foundation for integer multiplication and division operations, all of which are power-related Said the four operations are intrinsically linked in teaching, we must firmly grasp the power of reasoning the rules of each operation, so that students have a deep understanding of each operation