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受欢迎的初等代数 >

12/11*7-12

解答

\frac{12}{11} \cdot 7 - 12

解答

- \frac{48}{11}

+1

十进制

- 4.36363 \dots

求解步骤

\frac{12}{11} \cdot 7 - 12

遵循 PEMDAS 运算顺序

乘除（左右）

\frac{12}{11} \cdot 7 : \frac{84}{11}

\frac{12}{11} \cdot 7

将项转换为分式:

7 = \frac{7}{1}

= \frac{12}{11} \cdot \frac{7}{1}

使用分式法则:

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

= \frac{12 \cdot 7}{11 \cdot 1}

数字相乘:

12 \cdot 7 = 84

= \frac{84}{11 \cdot 1}

数字相乘:

11 \cdot 1 = 11

= \frac{84}{11}

= \frac{84}{11} - 12

加减（左右）

\frac{84}{11} - 12 : - \frac{48}{11}

\frac{84}{11} - 12

\frac{84}{11} - 12 = - \frac{48}{11}

\frac{84}{11} - 12

将项转换为分式:

12 = \frac{12 \cdot 11}{11}

= - \frac{12 \cdot 11}{11} + \frac{84}{11}

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{- 12 \cdot 11 + 84}{11}

- 12 \cdot 11 + 84 = - 48

- 12 \cdot 11 + 84

数字相乘:

12 \cdot 11 = 132

= - 132 + 84

数字相加/相减:

- 132 + 84 = - 48

= - 48

= \frac{- 48}{11}

使用分式法则:

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

= - \frac{48}{11}

= - \frac{48}{11}

= - \frac{48}{11}

流行的例子

80\div 4-2(2+1)^2

80 \div 4 - 2 (2 + 1)^{2}

-3(-1)^3-4(-2)^2

- 3 (- 1)^{3} - 4 (- 2)^{2}

-4{5+2[5+(-8)]}

- 4 {5 + 2 [5 + (- 8)]}

(-3)× 3× (-3)× (-3)× 3

(- 3) \times 3 \times (- 3) \times (- 3) \times 3

9 - 15 + 4