神马作文网which of the following fractions has a decimal equivalent th
来源：学生作业帮 编辑：神马作文网作业帮 分类：数学作业 时间：2024/11/17 17:11:44
which of the following fractions has a decimal equivalent that is a terminating decimal?
-------------------------------------------------------------------------------------------
A、10/189
B、15/196
C、16/225
D、25/144
E、39/128
不能使用计算机（器）
-------------------------------------------------------------------------------------------
A、10/189
B、15/196
C、16/225
D、25/144
E、39/128
不能使用计算机（器）
E分母是2的幂就是有限小数了.
189=3^3 * 7 ; 196=7^2 * 2^2 ; 225=5^2 * 3^2 ;
144=3^2 * 2^4 ; 128=2^7
分式化简后分母中只能含有2或5才能terminate
除了E以外的其它分母的质因子都含有3或7,不灵的.你试几个简单的分数就知道了
希望可以帮到你o(∩_∩)o
189=3^3 * 7 ; 196=7^2 * 2^2 ; 225=5^2 * 3^2 ;
144=3^2 * 2^4 ; 128=2^7
分式化简后分母中只能含有2或5才能terminate
除了E以外的其它分母的质因子都含有3或7,不灵的.你试几个简单的分数就知道了
希望可以帮到你o(∩_∩)o
GMAT which of the following fractions has a decimal equivale
Which of the following numbers if expressed in decimal form,
1.Which word of the following has a different stress from th
Which of the following sentences has an object complement?A.
Which of the following words has two syllables?A
英语 （ ）1.Which of the following is the symbol of Denmark?A.Th
The digit 4 has a value of 0.4 in which of the following?A.5
Which of the following states of a compound has the greatest
Which world of the following hhas a different stress from th
Which one of the following five is least like th
Which word of the following has a different stress from the
Which word of the following has the different syllables?A.eg