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 >

8-5× 2/7 \div 5/14

解答

8 - 5 \times \frac{2}{7} \div \frac{5}{14}

解答

4

求解步骤

8 - 5 \times \frac{2}{7} \div \frac{5}{14}

遵循 PEMDAS 运算顺序

乘除（左右）

5 \times \frac{2}{7} \div \frac{5}{14} : 4

5 \times \frac{2}{7} \div \frac{5}{14}

5 \times \frac{2}{7} = \frac{10}{7}

5 \cdot \frac{2}{7}

将项转换为分式:

5 = \frac{5}{1}

= \frac{5}{1} \cdot \frac{2}{7}

使用分式法则:

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

= \frac{5 \cdot 2}{1 \cdot 7}

数字相乘:

5 \cdot 2 = 10

= \frac{10}{1 \cdot 7}

数字相乘:

1 \cdot 7 = 7

= \frac{10}{7}

= \frac{10}{7} \div \frac{5}{14}

\frac{10}{7} \div \frac{5}{14} = 4

\frac{10}{7} \div \frac{5}{14}

使用分式法则:

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

= \frac{10}{7} \cdot \frac{14}{5}

分式相乘:

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

= \frac{10 \cdot 14}{7 \cdot 5}

数字相乘:

10 \cdot 14 = 140

= \frac{140}{7 \cdot 5}

数字相乘:

7 \cdot 5 = 35

= \frac{140}{35}

数字相除:

\frac{140}{35} = 4

= 4

= 4

= 8 - 4

加减（左右）

8 - 4 : 4

8 - 4

8 - 4 = 4

= 4

= 4

流行的例子

3^{4} \cdot 4^{3}

(17/22+1)+(2-9/11)

(\frac{17}{22} + 1) + (2 - \frac{9}{11})

(- 10 + 1)^{2}

5 \cdot 3^{2}

\frac{7}{9} - 3 + \frac{2}{3}