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一、先足符号,再相乘例1 计算(-11/6)×(-11/5)×(-11/4)×(-11/3)×(-11/2) 分析与解:几个不等于0的数相乘,积的符号由负因数的个数决定:负因数有奇数个,积为负:负因数有偶数个,积为正.积的符号确定之后,其余运算就与小学的求积方法相同.
First, the first foot symbol, then multiplication example 1 Calculation (-11/6) × (-11/5) × (-11/4) × (-11/3) × (-11/2) Analysis and solution: Several numbers that are not equal to 0 are multiplied. The sign of the product is determined by the number of negative factors: the negative factor has an odd number, and the product is negative: the negative factor has an even number and the product is positive. After the sign of the product is determined, the rest of the operations are Same as the quadrature method for elementary schools.