數學的基本概念附英文翻譯

分數：fractions

分子：numerator

分母：denominator

分數的加減乘除：addition，subtraction，multiplication and division of fractions

繁分數和假分數：mixed number and improper fraction

繁分數是指一個數由一個整數和一個分數構成。

假分數是指分子大於分母的分數。例如：7/3

小數：decimals

科學計數法：scientific notation

Sometimes decimals are expressed as the product of a number with only one digit to the left of the decimal point and a power of 10. This is called scientific notation. For example, 231 can be written as 2.31×102 and 0.0231 can be written as 2.31×10-2. When a number is expressed in scientific notation, the exponent of the 10 indicates the number of places that the decimal point is to be moved in the number that is to be multiplied by a power of 10 in order to obtain the product. The decimal point is moved to the right if the exponent is positive and to the left if the exponent is negative. For example, 20.13×103 is equal to 20,130 and 1.91×10-4 is equal to 0.000191.