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初小算术第七册第一章《多位数的乘法和除法》的内容分两节。第一节《用三、四位数乘多位数》有13个例题。通过这些例题的讲授,要使学生进一步理解乘法的意义和应用;掌握用三、四位数乘多位数的计算法则;懂得把被乘数和乘数调换相乘,结果不变,可以用来验算乘法和使运算简便;熟练乘数中间和末尾有零、被乘数末尾有零等各种情况的乘法运算和乘法的简捷算法。
The first small arithmetic seventh chapter first chapter “Multi-digit multiplication and division” content divided into two sections. The first section “with three or four digits by multi-digit” There are 13 cases. Through these examples of teaching, to enable students to further understand the meaning and application of multiplication; master with three or four digits multiplied by the number of rules of calculation; know how to multiply the multiplier and multiplier, the result unchanged, you can use To check the multiplication and make the operation easy; skilled multipliers in the middle and at the end of a zero, multiplicand at the end of zero and other cases of multiplication and multiplication simple algorithm.