開口驚艷你的數(shù)學老師:符號英文如何表達?

編輯: 逍遙路 關(guān)鍵詞: 高中數(shù)學 來源: 高中學習網(wǎng)

2x(-4)=-8,你能用英語把這個等式(equation)讀出來嗎?被難倒了吧!如果還有波形符號、立方根、函數(shù)表達等,你是不是心慌了呢?別著急!下面給你整理歪果仁如何表達各種數(shù)學符號和標點符號,看完后你馬上就會說了~~

Mathematical symbols 數(shù)學符號

01. +: plus 加號;正號

“1+1”讀作:one plus one

02. -: minus; negative 減號;負號

“2-1”讀作:two minus one

“-3”讀作:minus three或negative three

“2-(-3)”讀作:two minus negative three

03. ±: plus-minus sign 正負號

“±1” 讀作:plus or minus one

04. ×: multiplied by ; times 乘號

“2×3” 讀作:two multiplied by three 或 two times three

05. ÷: divided by 除號

“4÷2”讀作:four divided by two

06. =: equals; is equal to 等于號

“1+1=2”讀作:One plus one equals two. 或 One plus one is equal to two.

07. ≠: is not equal to 不等于號

“a≠b”讀作:a is not equal to b

08. ≌: congruent to 全等(兩個圖形形狀相同、大小相等)

“△ABC≌△DEF”讀作:Triangle ABC is congruent to Triangle DEF.

09. ≈: approximately equal to 約等于號

“3×3≈10” 讀作:Three multiplied by three is approximately equal to ten.

10. <: is less than 小于號

“1<2”讀作 One is less than two.

11. >: is greater than 大于號

“2>1”讀作:Two is greater than one.

12. ≮: is not less than 不小于號

“3≮2”讀作:Three is not less than two.

13. ≯: is not greater than 不大于號

“2≯4” 讀作:Two is not greater than four.

14. ≤: is less than or equal to 小于或等于號

“2≤3”讀作:Two is less than or equal to three.

15. ≥: is greater than or equal to 大于或等于號

“5≥4”讀作:Five is greater than or equal to four.

16. %: percent 百分之……

“10%”讀作:ten percent

17. ‰ : per mill ; per thousand 千分之……

“10‰”讀作:ten per thousand

18. ∞: infinity 無限大號

“-∞” 讀作:negative infinity

19. ∝: varies as 與...成比例

“X∝Y”讀作:X varies as Y

20. √ ̄: square root 平方根

“√ ̄16=4”讀作:The square root of sixteen is four.

21. 3√ ̄: cube root 立方根

“3√ ̄27=3”讀作:The cube root of 27 is 3.

22. ∵: since; because 因為

“∵1+1=2”讀作:because one plus one equals two

23. ∴: hence; therefore 所以

“∴1<2”讀作:hence one is less than two

24. ∠: angle 角

“∠A”讀作:angle A

“∠A +∠B+∠C=180°” 讀作:The measure of angle A plus angle B plus angle C equals 180 degrees.

25. ⌒: semicircle 半圓

“⌒AB”讀作:semicircle AB

26. ⊙: circle 圓

“⊙A”讀作:circle A

27. ○: circumference 圓周

“○=π×d”讀作:Pi multiplied by d equals circumference.

28. π: pi constant 圓周率

“π×d”讀作:pi multiplied by d

29. △: triangle 三角形

“△ABC”讀作:triangle ABC

What is the area of triangle ABC? 求三角形ABC的面積。

30. ⊥: perpendicular to 垂直于

“A⊥B”讀作:A is perpendicular to B.

31. //: parallel to 平行于

Line AB is parallel to line CD.

32. ∪: union of 并,合集

“A∪B”讀作:the union of A and B

33. ∩: intersection of 交,通集

“A∩B”讀作:The intersection of A and B

34. ∫: the integral of ……的積分

“∫x”讀作:the integral of x

35. ∑: summation of 總和

“∑x”讀作:the summation of x

36 equation 方程式、等式

“y = kx” 讀作:Y varies as x.

K is "the constant of variation. y與x成正比(y是x的正比函數(shù)),k是常數(shù)。

“y = k/x”讀作:Y varies inversely as x. y與x成反比例(y是x的反比例函數(shù))

(來源:英語天天練)


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