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除数是两位数的除法的试商方法,大致有如下九种:1.去尾法。试商时把除数看作和它接近的较小的整十数。例如284÷48和284÷43,都用40去试商。2.收尾法。试商时把除数看作和它接近的较大的整十数。例如284÷48和284÷43,都用50去试商。3.四舍五入法。当除数的个位是1、2、3、4时,就用较小的整十数去试商;当除数的个位是5、6、7、8、9时,就用较大的整十数去试商。例如284÷48,用50去试商;284÷43,用40去试商。
Divisor is a two-digit division of the trial method, roughly the following nine: 1. To the tail method. Think of a divisor as the smaller, whole number that comes close to it. For example, 284 ÷ 48 and 284 ÷ 43, with 40 to try. 2 finishing method. Think of a divisor as the larger, whole number that comes close to it. For example, 284 ÷ 48 and 284 ÷ 43, with 50 to try. 3 rounding method. When the divisor bit is 1, 2, 3, 4 hours, with a smaller whole number to test; when the divisor bits are 5,6,7,8,9, with a larger whole Ten to try. For example, 284 ÷ 48, with 50 to try; 284 ÷ 43, with 40 to try.