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受欢迎的初等代数 >

6-5/2-2/4

解答

6 - \frac{5}{2} - \frac{2}{4}

解答

3

求解步骤

6 - \frac{5}{2} - \frac{2}{4}

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

约分:

2

\frac{1}{2}

= 6 - \frac{5}{2} - \frac{1}{2}

遵循 PEMDAS 运算顺序

加减（左右）

6 - \frac{5}{2} - \frac{1}{2} : 3

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

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

6 - \frac{5}{2}

将项转换为分式:

6 = \frac{6 \cdot 2}{2}

= \frac{6 \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{6 \cdot 2 - 5}{2}

6 \cdot 2 - 5 = 7

6 \cdot 2 - 5

数字相乘:

6 \cdot 2 = 12

= 12 - 5

数字相减:

12 - 5 = 7

= 7

= \frac{7}{2}

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

\frac{7}{2} - \frac{1}{2} = 3

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

使用法则

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

= \frac{7 - 1}{2}

数字相减:

7 - 1 = 6

= \frac{6}{2}

数字相除:

\frac{6}{2} = 3

= 3

= 3

= 3

流行的例子

(3(-1)-3(2))/(-5)

\frac{3 ( - 1 ) - 3 ( 2 )}{- 5}

1 \times 2^{8}

7\div (4× 2+9-10)

7 \div (4 \times 2 + 9 - 10)

(252^2-23^2)/(275)

\frac{25 2 ^{2} - 2 3 ^{2}}{275}

(13 \cdot 14)^{3}