加法】“+”号 在英语里一般用这三个:①and ②plus ③add例:1. Seven and / plus eight makes fifteen.7加8等于15。2. If you add ten to eight, you get eighteen.10加8等于18。【减法】“—”号在英语里一般用这三个:① minus ②from ③take (away)(from)例:1. Eight minus five is (leaves)three.8减 5等于3。/ 8减5余3。(注:在减法里,“=”也可以用leaves, 同汉语里的“余”)2. 4 from20 leaves 16.20减4余16。3. Ten take away four is six.10减去4得6。【乘法】“x” 号在英语里一般用这两个:① times ②multiplied by例:1. Five times three is / equals fifteen.5乘以3等于15。2. Five multiplied bytwo equals ten.5乘以2等于10。【除法】“÷”号在英语里一般用这两个:① divided by ② into例:1. Twelve divided by four makes three.12除以4等于3。2. Four into twelve is three.12除以4等于3。
抱歉没写完就发送了。减:Two minus one equals one。二减一等于一;乘:Multiply two by three, get six.二乘三等于六;Two times eight is sixteen,二乘八等于十六;除:Two divided by one equals one。