zs

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

受欢迎的初等代数 >

2\div 5\div 21\div 5

解答

2 \div 5 \div 21 \div 5

解答

\frac{2}{525}

+1

十进制

0.00380 \dots

求解步骤

2 \div 5 \div 21 \div 5

遵循 PEMDAS 运算顺序

乘除（左右）

2 \div 5 = \frac{2}{5}

= \frac{2}{5} \div 21 \div 5

\frac{2}{5} \div 21 = \frac{2}{105}

\frac{2}{5} \div 21

将项转换为分式:

21 = \frac{21}{1}

= \frac{2}{5} \div \frac{21}{1}

使用分式法则:

\frac{a}{b} \div \frac{c}{d} = \frac{a}{b} \times \frac{d}{c}

= \frac{2}{5} \cdot \frac{1}{21}

分式相乘:

\frac{a}{b} \cdot \frac{c}{d} = \frac{a \cdot c}{b \cdot d}

= \frac{2 \cdot 1}{5 \cdot 21}

数字相乘:

2 \cdot 1 = 2

= \frac{2}{5 \cdot 21}

数字相乘:

5 \cdot 21 = 105

= \frac{2}{105}

= \frac{2}{105} \div 5

\frac{2}{105} \div 5 = \frac{2}{525}

\frac{2}{105} \div 5

将项转换为分式:

5 = \frac{5}{1}

= \frac{2}{105} \div \frac{5}{1}

使用分式法则:

\frac{a}{b} \div \frac{c}{d} = \frac{a}{b} \times \frac{d}{c}

= \frac{2}{105} \cdot \frac{1}{5}

分式相乘:

\frac{a}{b} \cdot \frac{c}{d} = \frac{a \cdot c}{b \cdot d}

= \frac{2 \cdot 1}{105 \cdot 5}

数字相乘:

2 \cdot 1 = 2

= \frac{2}{105 \cdot 5}

数字相乘:

105 \cdot 5 = 525

= \frac{2}{525}

= \frac{2}{525}

流行的例子

(25 \cdot 4) - 2^{7} + 8 \cdot 3

(6+4)× 2\div 5-(8+3)

(6 + 4) \times 2 \div 5 - (8 + 3)

5 \cdot 7^{0}

化简 [-2-1/2 ]

s im pl i f y [- 2 - \frac{1}{2}]

8× (2-8)+(-5)^2-(1-7)

8 \times (2 - 8) + (- 5)^{2} - (1 - 7)