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 >

1/2-3-1

解答

\frac{1}{2} - 3 - 1

解答

- \frac{7}{2}

+1

十进制

- 3.5

求解步骤

\frac{1}{2} - 3 - 1

遵循 PEMDAS 运算顺序

加减（左右）

\frac{1}{2} - 3 = - \frac{5}{2}

\frac{1}{2} - 3

将项转换为分式:

3 = \frac{3 \cdot 2}{2}

= - \frac{3 \cdot 2}{2} + \frac{1}{2}

因为分母相等，所以合并分式:

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{- 3 \cdot 2 + 1}{2}

- 3 \cdot 2 + 1 = - 5

- 3 \cdot 2 + 1

数字相乘:

3 \cdot 2 = 6

= - 6 + 1

数字相加/相减:

- 6 + 1 = - 5

= - 5

= \frac{- 5}{2}

使用分式法则:

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

= - \frac{5}{2}

= - \frac{5}{2} - 1

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

- \frac{5}{2} - 1

将项转换为分式:

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

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

因为分母相等，所以合并分式:

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

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

- 1 \cdot 2 - 5 = - 7

- 1 \cdot 2 - 5

数字相乘:

1 \cdot 2 = 2

= - 2 - 5

数字相减:

- 2 - 5 = - 7

= - 7

= \frac{- 7}{2}

使用分式法则:

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

= - \frac{7}{2}

= - \frac{7}{2}

流行的例子

(5/19)/[(15/20)+(5/19)]

(5/19) / [(15/20) + (5/19)]

144 - 8 + 6

2^{4} + 3 (2) - 10

3 + 5 - 5 + 3 - 9 + 12

(-4-2)/(6-(-6))

\frac{- 4 - 2}{6 - ( - 6 )}