natural number 自然数
positive number 正数
negative number 负数
odd integer/number 奇数
even integer/number 偶数
Integer/whole number 整数
positive whole number 正整数
negative whole number 负整数
consecutive number 连续整数
real/rational number 实数,有理数
Irrational number 无理数
inverse /reciprocal 倒数
mode 众数
composite number 合数
prime number 质数
common divisor 公约数
multiple 倍数
common multiple 公倍数
factor因子
common factor 公因子
common ratio 公比
nonnegative 非负的
mean平均数
median中值
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