Teaching aids : to know the essence of fractions ; to know denominator , numerator , the units of fraction , to know the essence of the whole ; train their espial ability and abstract epitome ability 教学目标:使学生正确理解分数的意义,理解分母、分子、分数单位、单位“ 1 ”的意义;培养学生观察能力和抽象概括能力。
分数: fraction; fractional number单位: unit倍数单位: multiple unit对数单位,对元: logarithm unit个数单位: units of number计数单位: cu counting unit; digit; tally; unit of enumeration记数单位: scale of notation权数单位: unit of weight虚数单位: ij; imaginary number; imaginary unit致谢(复数单位): thanks沉降系数单位: sv凯塞波数单位: kayser令(纸张的计数单位): ream热力学函数单位: entropy unit生产指数单位成本: production index unit cost单位分数: unit fraction分数数学单位: fractional arithmetic unitsx射线衰减系数单位: emi; unit of x-ray attenuation coefficient信息的自然对数单位: neutral unit斯维德伯格漂浮,沉降系数单位: svedberg flotationt分数: t score; t-score分数: 1.[数学] fraction; fractional number 带分数 mixed number; 繁分数 complex fraction; 假分数 improper fraction; 真分数 proper fraction2.(表示成绩等的数字) mark; grade; point 他在考试中得到好分数。 he attained a good mark in the examination. 他的三角学分数很低。 he received a low mark for trigonometry. 他的学期论文得了个不及格分数。 he received a falling grade on the term paper参数单: parameter menu点数单: in-tally sheet计数单: adding machine tape; number list; numerical list; tally sheet