加                   plus(prep.), add(v.), addition(n.)
和                   sum
减                   minus(prep.), subtract(v.), subtraction(n.)
被减数               minuend
减数                 subtrahend
差                   difference
乘                   times(prep.), multiply(v.), multiplication(n.)
被乘数               multiplicand,
乘数                 multiplication
积                   product

除                  divided by(prep.), divide(v.), division(n.)

加法                addition

减法                 subtraction

乘法                 multiplication

除法                 division
可被整除的数        divisible
被整除                divided evenly
被除数               dividend
除数                 divisor
余数                  remainder
商                   quotient

二加一等于三         2 plus 1 equals 3       

四减二等于二         4 minus 2 equals 2      
四乘以五            4 multiplied by 5, 4 times 5

二十除以五等于       20 divided by 5,
等于                 equals, is equal to, is equivalent to
大于                 is greater than
小于                  is lesser than

大于等于             is equal or greater than
小于等于             is equal or lesser than
数字                 digit
数                   number
自然数               natural number
整数                 whole number
正整数                positive whole number
连续整数             consecutive number
奇数                  odd number
偶数                  even number
合数                  composite number e.g. 4,6,8,9,10,12,14,15…
质数                  prime number e.g.2,3,5,7,11,13,15…
倒数                  inverse reciprocal
小数                 decimal
小数点               decimal point
纯小数                decimal fraction
无穷小数              Infinite decimal
循环小数              recurring decimal
分数                 fraction
真分数                proper fraction
假分数                improper fraction
带分数                mixed fraction
普通分数              common fraction
简分数                simple fraction
繁分数                complex fraction
四分之一              quarter

四分之三             three-quarter

三分之一             third

二分之一             half
分子                 numerator
分母                 denominator
公约数                common divisor
倍数                  multiple
(质)因子              (prime) factor
公因子                common factor
比                   ratio
正                   positive
正数                  positive number

负                   negative
零                   null, zero,

零点四              zero point four         

十进制               decimal system
十位                  tens
个位                  units
二进制               binary system
进位                 carry
四舍五入             round
下舍入               round down
上舍入               round up
有效数字             significant digit
无效数字             insignificant digit

最小公倍数           the Lowest Common

最大公约数           the Highest Common
平均数                average

近似值                approximation

估算                  estimation
混合运算              Mixed Operation

等式                  equation

百分比                percentage
比                   ratio                   

比例                proportion              
分子                 numerator               

公分母              common denominator
使乘五次方           to raise to the power of five
某数的平方            x squared               

平方根              square root               

立方根               cube root

比例法               rule of three    

等式,方程式          equation  

未知数               unknown