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汉语拼音：sì shě wǔ rù

常用的一种近似计算法。根据需要，将计算所得的数保留到某一位，剩下的部分，头一个数字不大于4时舍去不计，不小于5时舍去后向前一位进1。舍去整数部分时，舍去几位整数就要添上几个0。

1. 数学运算中一种取近似值的计算方法。遇多位小数时，可截取若干位，如被舍部分的头一位数满五，就在所取数的末位加一，不满五的就舍去。例如圆周率π＝3.14159265……若取五位小数，则为3.14159；取四位小数，则为3.1416。

   鲁迅 《热风·随感录五十九》：“因为历史结帐，不能像数学一般精密，写下许多小数，却只能学粗人算帐的四舍五入法门，记一笔整数。”

• We needed to do decimals to round up and round down numbers.

  我们得把小数四舍五入成整数。

• The price has been rounded up from & 647.50 to & 650.

  价格已按四舍五入法由 647.50 镑 调高为650镑整.

• We make this distinction because continuous variables are rounded.

  我们之所以作出这样的区别是因为连续变量是四舍五入的.

• The prices of the goods have been rounded down.

  货价已按四舍五入法调低为整数.

• These values have been rounded off.

  这些值已经经过四舍五入.

• If your income is & 2386.46 , it will be rounded down to & 2,386 for tax purposes.

  如果你的所得是 2386.46 英镑, 为纳税则可按四舍五入调低为2386英镑整.

• Frankly, you could round it off to one billion dollars!

  老实说, 你可以四舍五入成十亿美元!

• Rounded to 150, this has become famous asthe Dunbar number.

  四舍五入为150, 这就是著名的“邓巴数字”(150法则).

• Any rounding or truncation of floating - point numbers is implementation defined.

  任何四舍五入或 浮点数 的舍去是实作自订的.

• Note: Figures may not add up their totals due to rounding.

  注: 因四舍五入关系,各项数字相加或与总计数字略有出入.

• Note : Figures may not add up to their totals due to rounding.

  因四舍五入关系,各项数字相加或与总计数字略有出入.

• Round each measurement to the nearest whole inch or centimetre.

  将每个测量数目四舍五入到最近的英寸或厘米整数.

• The figures in the table are rounded to the nearest ton.

  表中的数字四舍五入到最接近的整吨数.

• You are well rounded, with a complete perspective on life.

  你是好四舍五入, 具有完整的角度对生命.

• The figure should be half adjusted to the whole number.

  该数字要四舍五入至整数.