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受欢迎的初等代数 >

-7\div 10\div 1\div 8

解答

- 7 \div 10 \div 1 \div 8

解答

- \frac{7}{80}

+1

十进制

- 0.0875

求解步骤

- 7 \div 10 \div 1 \div 8

遵循 PEMDAS 运算顺序

乘除（左右）

- 7 \div 10 = \frac{- 7}{10}

= \frac{- 7}{10} \div 1 \div 8

\frac{- 7}{10} \div 1 = - \frac{7}{10}

\frac{- 7}{10} \div 1

将项转换为分式:

1 = \frac{1}{1}

= \frac{- 7}{10} \div \frac{1}{1}

使用分式法则:

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

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

使用法则

\frac{a}{a} = 1

\frac{1}{1} = 1

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

使用分式法则:

\frac{- a}{b} = - \frac{a}{b}

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

乘以:

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

= - \frac{7}{10}

= - \frac{7}{10} \div 8

- \frac{7}{10} \div 8 = - \frac{7}{80}

- \frac{7}{10} \div 8

将项转换为分式:

8 = \frac{8}{1}

= - \frac{7}{10} \div \frac{8}{1}

使用分式法则:

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

= - \frac{7}{10} \cdot \frac{1}{8}

分式相乘:

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

= - \frac{7 \cdot 1}{10 \cdot 8}

数字相乘:

7 \cdot 1 = 7

= - \frac{7}{10 \cdot 8}

数字相乘:

10 \cdot 8 = 80

= - \frac{7}{80}

= - \frac{7}{80}

流行的例子

5^{2} + 5 \times 5

- 3 (5) + 5

- 3 (5) + 2

50 + 10 \div 2 + 75

- 4 \cdot (- 5) - 5