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一、加：用 and、plus、added to 等词表示. ２＋４＝６可译为： Two and four is six . Two plus four is equal to six . Two added to four equals six . Two and four makes six . Two plus four will be six . If you add two to four ,you get six . 二、减：用 minus、taken from、subtract from 等表示. ８－３＝５可译为： Eight minus three is five . Eight minus three is equal to five . Three taken from eight leaves five . Subtract three from eight leaves five . Take three from eight and the remainder is five . 三、乘：用 multiply...by...、multiplied by、times 等表示. ３×５＝１５可译为： Multiply three by five is (gives)fifteen . Three multiplied by five is fifteen . Multiply three by five ,you get fifteen . Three times five is (makes,will be ,equals,is equal to ) fifteen . 四、除：用 divide...by...、divided by、divide...into...、into 等表示. ２４÷８＝３可译为： Twenty-four divided by eight makes (is ,equals ) three . Twenty-four divided by eight is equal to three . Eight into twenty-four goes three times . Divide eight into twenty-four ,and you get three . Divide twenty-four by eight ,and you get three . ——————————— add加 reduce 减(v.减少 / 降低 / 使处于 / 把…分解) multiply /times 乘 divided by <数>除以 1.加 plus(介词，作形容词时，是正的，等同于positive) add（动词） 比如： 4 plus 3 equals 7. If you add 4 to 3 you get 7. Her mark was B plus。 她的分数B 。 2、减 minus （介词，作形容词讲时，是“负的”的意思，相当negative）subtract（动词，常与from连用）减去；扣除 比如： 12 minus 7 leaves 5. 十二减去七剩五。 The temperature was minus 20 degrees. 温度是零下20度。 If you subtract 3 from 5, you get 2. 3.乘 multiply（动词）比如： 3 multiplied by 5 equals 15. 三乘五等于十五。 4.除以 divided by (动词） 比如： 15 divided by 3 equals 5. 15除以3等于5。 Three will not divide into eleven. 三除不尽十一。 当然：加减乘除的名词形式如下 ： 1. addition 加法 2. subtraction减法 3 .multiplication乘法 4 .division除法
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