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受欢迎的初等代数 >

2*1/4-1

解答

2 \cdot \frac{1}{4} - 1

解答

- \frac{1}{2}

+1

十进制

- 0.5

求解步骤

2 \cdot \frac{1}{4} - 1

遵循 PEMDAS 运算顺序

乘除（左右）

2 \cdot \frac{1}{4} : \frac{1}{2}

2 \cdot \frac{1}{4}

将项转换为分式:

2 = \frac{2}{1}

= \frac{2}{1} \cdot \frac{1}{4}

使用分式法则:

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

= \frac{2 \cdot 1}{1 \cdot 4}

\frac{2 \cdot 1}{1 \cdot 4} = \frac{1}{2}

\frac{2 \cdot 1}{1 \cdot 4}

\frac{2 \cdot 1}{1 \cdot 4} = \frac{2}{4}

\frac{2 \cdot 1}{1 \cdot 4}

数字相乘:

2 \cdot 1 = 2

= \frac{2}{1 \cdot 4}

数字相乘:

1 \cdot 4 = 4

= \frac{2}{4}

= \frac{2}{4}

对数字约分

\frac{2}{4} = \frac{1}{2}

= \frac{1}{2}

= \frac{1}{2}

= \frac{1}{2} - 1

加减（左右）

\frac{1}{2} - 1 : - \frac{1}{2}

\frac{1}{2} - 1

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

\frac{1}{2} - 1

将项转换为分式:

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

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

- 1 \cdot 2 + 1 = - 1

- 1 \cdot 2 + 1

数字相乘:

1 \cdot 2 = 2

= - 2 + 1

数字相加/相减:

- 2 + 1 = - 1

= - 1

= \frac{- 1}{2}

使用分式法则:

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

= - \frac{1}{2}

= - \frac{1}{2}

= - \frac{1}{2}

流行的例子

6^{2} - 2^{2} \cdot 8 + 18

15\div 5× 3-2+5-2

15 \div 5 \times 3 - 2 + 5 - 2

(3+3\div 3)× 3

(3 + 3 \div 3) \times 3

- 3 + 15 - 2 - 12

64\div (48-4^2)

64 \div (48 - 4^{2})