加减乘除乘方英语讲解.ppt

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1、加减乘除乘方英语讲解The Expressionsaddition 加加3+4=？How much is three plus four?3+4=7plus(prep.)add(v.)Three plus four is seven.Three and four makes seven.equal v./adj.Three and four is equal to seven.Three added to four equals seven.If you add 4 to 3，you get 7.Whats three plus four?Its seven.subtraction 减减106

2、?How much is ten minus six?1064minus(prep),subtract(v.)Ten minus six is four.We also can use“takefrom”:Take(subtract)six from ten,and the remainder is four.(remainder n.余下的部分)Six taken(subtracted)from ten is four.multiplication 乘乘Times(prep.)or multiply（v.）34?How much is three times four?3412Three t

3、imes four is twelve.Multiply three by four,we get twelve.Three multiplied by four makes twelve.division 除除155?How much is fifteen divided by five?1553Fifteen divided by five is three.Fifteen divided by five equals/makes four.Divide fifteen by five,we get three.power 乘方乘方乘方、幂 power 二次方，平方 square 三次方，

4、立方 cube 四次方 the power of four,the fourth power n次方 the power of n,the nth powerExample:Three to the 8th power（The 8th power of 3）3的8次方4 to the power of 3 is 4.4 的 3 次方是 4。Some fractions 分数 three fourths;three quarters a half a/one quarter1 one and a half 3 three and one fourth;three and one quarter Some examples:一个半小时：one and a half hours二又四分之三米：two and three-fourths meters五分之四英寸：four-fifths inchThank you!Thank you!谢谢大家！结结 语语