都說(shuō)國(guó)外數(shù)學(xué)很簡(jiǎn)單，學(xué)不會(huì)算式的英文表達(dá)，一切全“白搭”（代數(shù)篇）

?≌

　　congruent ['k??gr??nt] to，全等(兩個(gè)圖形形狀相同、大小相等)，“△ABC≌△DEF”讀作：Triangle ABC is congruent to Triangle DEF.

　　≈

　　approximately equal to 約等于號(hào)，“3×3≈10” 讀作：Three multiplied by three is approximately equal to ten.

　　<

　　is less than 小于號(hào)，“1<2”讀作 One is less than two.

　　>

　　is greater than 大于號(hào)，“2>1”讀作：Two is greater than one.

　　≤

　　is less than or equal to 小于或等于號(hào)，“2≤3”讀作：Two is less than or equal to three.

　　≥

　　is greater than or equal to 大于或等于號(hào)，“5≥4”讀作：Five is greater than or equal to four.

+

　　plus 加號(hào);正號(hào)，“1+1”讀作：one plus one

　　-

　　minus ['ma?n?s]; negative ['neg?t?v]，減號(hào);負(fù)號(hào)，“2-1”讀作：two minus one，“-3”讀作：minus three或negative three，“2-(-3)”讀作：two minus negative three

　　±

　　plus-minus sign 正負(fù)號(hào)，“±1” 讀作：plus or minus one

　　×

　　multiplied [’m?lt?’pla?d] by ; times，乘號(hào)，“2×3” 讀作：two multiplied by three 或 two times three

　　÷

　　divided by 除號(hào)，“4÷2”讀作：four divided by two

　　=

　　equals; is equal to 等于號(hào)，“1+1=2”讀作：One plus one equals two. 或 One plus one is equal to two.

%

　　percent 百分之……，“10%”讀作：ten percent

　　∞

　　infinity [?n'f?n?t?] 無(wú)限大號(hào)，“-∞” 讀作：negative infinity

　　square root 平方根，“ =4”讀作：The square root of sixteen is four.

　　cube root 立方根，“ =3”讀作：The cube root of 27 is 3.

　　∵

　　since; because 因?yàn)?，“?+1=2”讀作：because one plus one equals two

　　∴

　　hence; therefore 所以，“∴1<2”讀作：hence one is less than two