250x250249x249的算法
250x250-249x249的算法 -
＝250²-250²+500-1 ＝500 - 1 ＝499
= 240×250 + 1×(250 - 240 - 1)= 240×250 + 1×9
＝250²-250²+500-1 ＝500 - 1 ＝499
= 240×250 + 1×(250 - 240 - 1)= 240×250 + 1×9
= 240×250 + 1×(250 - 240 - 1)= 240×250 + 1×9
= 240×250 + 1×(250 - 240 - 1)= 240×250 + 1×9
2021/2022×250简便算法是什么? -
2021/2022x250 =(1-1/2022)x250 =250-250/2022 =249又1772/2022