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受欢迎的初等代数 >

1/2 5(18+8)

解答

\frac{1}{2} 5 (18 + 8)

解答

65

求解步骤

\frac{1}{2} \cdot 5 (18 + 8)

遵循 PEMDAS 运算顺序

计算括号内的值

(18 + 8) : 26

18 + 8

18 + 8 = 26

= 26

= \frac{1}{2} \cdot 5 \cdot 26

乘除（左右）

\frac{1}{2} \cdot 5 \cdot 26 : 65

\frac{1}{2} \cdot 5 \cdot 26

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

\frac{1}{2} \cdot 5

将项转换为分式:

5 = \frac{5}{1}

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

使用分式法则:

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

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

数字相乘:

1 \cdot 5 = 5

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

数字相乘:

2 \cdot 1 = 2

= \frac{5}{2}

= \frac{5}{2} \cdot 26

\frac{5}{2} 26 = 65

\frac{5}{2} \cdot 26

将项转换为分式:

26 = \frac{26}{1}

= \frac{5}{2} \cdot \frac{26}{1}

使用分式法则:

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

= \frac{5 \cdot 26}{2 \cdot 1}

消掉

\frac{5 \cdot 26}{2 \cdot 1} : 65

\frac{5 \cdot 26}{2 \cdot 1}

数字相乘:

2 \cdot 1 = 2

= \frac{5 \cdot 26}{2}

数字相除:

\frac{26}{2} = 13

= 5 \cdot 13

数字相乘:

5 \cdot 13 = 65

= 65

= 65

= 65

= 65

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5 (- 16 \div (21 - 13) - 3 (- 7 + 15))

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