Bilingual Mathematics Teaching(5)Rational Numbers

Words and Expressions

67 有理数 rational number
68 正数 positive number
69 负数 negative number
70 符号 sign
71 非负数 non-negative
72 数轴 number axis
73 原点 origin
74 正方向 positive direction
75 单位长度 unit length
76 相反数 opposite number
77 绝对值 absolute number
78 倒数 reciprocal
79 乘方 power
80 power
81 底数 base number
82 指数 exponent
83 科学记数法 scientific notation

Examples

1、1 and -1 are opposite numbers.

1和-1互为相反数。

2、(1)2 to the power of 3

(2)2 to the third power

(3)the third power of 2

2的3次方。

3、Integers and fractions are called by an umbrella term rational number.

整数和分数统称为有理数。

4、If earning fifty yuan is written as +50, paying fifty yuan should be written as -50.

如果收入50元记作+50,那么支出50元应记作-50.

5、All the rational numbers can be marked on a number axis.

所有的有理数都可以在数轴上表示。

6、Among two negative numbers, the one with greater absolute value is less than the other.

两个负数比较大小,绝对值大的反而小。

7、In scientific notation, all numbers are written in the form a×10^n, where 1≤|a|<10 and n is a positive integer.

科学记数法中,所有的数都被写成a×10^n的形式,其中1≤|a|<10,n是正整数。

(0)

相关推荐