4.?代数式，方程，不等式algebraicterm代数项?liketerms,similarterms相同种类项?numericalcoefficient数字系数literalcoefficient字母系数?inequality不等式triangleinequality三角不等式range值域originalequation原方程?equivalentequation同解方程，等价方程?linearequation线*方程?5.?分数，小数properfraction真分数?improperfraction假分数?mixednumber带分数?vulgarfraction，commonfraction普通分数?simplefraction简分数?complexfraction繁分数numerator分子?denominator分母?commondenominator（最小）公分母quarter四分之一?decimalfraction纯小数?infinitedecimal无穷小数?recurringdecimal循环小数?tenthsunit十分位??56.集合union并集?propersubset真子集?solutionset解集?7.?数列arithmeticprogression等差数列?geometricprogression等比数列?8.?其它?approximate近似?clockwise顺时针方向?cardinal基数?ordinal序数?directproportion正比?distinct不一样的?estimation估计，近似?parentheses括号?proportion比率?permutation排列?combination组合?table表格?trigonometricfunction三角函数unit单位,位?几何GEOMETRY1.角alternateangle内错角?correspondingangle同位角?verticalangle对顶角?centralangle圆心角?interiorangle内角?exteriorangle外角?supplementaryangles补角complementaryangle余角?adjacentangle邻角acuteangle锐角?obtuseangle钝角rightangle直角?roundangle周角?straightangle平角?includedangle夹角?
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