Bilingual Mathematics Teaching(5)Rational Numbers
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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 | 幂 | 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。
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