5、entnumber分数simplefraction简分数mixed number 带分数proper fraction 真分数improper fraction 假分数,带分数numerator分子denominator分母10ratio比率equals,isequivalentto等于isapproximateequalto近似等于,约等于isgreaterthan大于islesserthan小于isequalorgreaterthan大于等于isequalorlesserthan小于等于operate运算operator运算符o
6、perationlaw运算律exchangelaw交换律combinationlaw结合律distributionlaw分配律mean平均数arithmeticmean算术平均数geometricmean几何平均数Weighted average 加权平均值crossmultiply交叉相乘absolutevalue绝对值mutualdivide辗转相除decimalarithmetic十进制运算binaryarithmetic二进制运算octalarithmetic八进制运算hexadecimalarithmetic十六进制运算s
7、quareroot平方根arithmeticsquareroot算术平方根cuberoot立方根radical sign 根号directproportion正比例inverseproportion反比例Least common denominator(L.C.D) 最小公分母Least common multiple (L.C.M)最小公倍数Greatestcommondivisor(G.C.D)最大公约数approximatevalue近似值函数functionRange 值域Domain 定义域3.有关代数式,方程,不等式,多