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受欢迎的初等代数 >

(3/9 \div 3/1) 4/1

解答

(\frac{3}{9} \div \frac{3}{1}) \frac{4}{1}

解答

\frac{4}{9}

+1

十进制

0.44444 \dots

求解步骤

(\frac{3}{9} \div \frac{3}{1}) \frac{4}{1}

\frac{3}{9} = \frac{1}{3}

约分:

3

\frac{1}{3}

= \frac{1}{3} \div \frac{3}{1} \cdot \frac{4}{1}

\frac{3}{1} = 3

使用法则

\frac{a}{1} = a

3

= \frac{1}{3} \div 3 \cdot \frac{4}{1}

\frac{4}{1} = 4

使用法则

\frac{a}{1} = a

4

= \frac{1}{3} \div 3 \cdot 4

遵循 PEMDAS 运算顺序

乘除（左右）

\frac{1}{3} \div 3 \cdot 4 : \frac{4}{9}

\frac{1}{3} \div 3 \cdot 4

\frac{1}{3} \div 3 = \frac{1}{9}

\frac{1}{3} \div 3

将项转换为分式:

3 = \frac{3}{1}

= \frac{1}{3} \div \frac{3}{1}

使用分式法则:

\frac{a}{b} \div \frac{c}{d} = \frac{a}{b} \times \frac{d}{c}

= \frac{1}{3} \cdot \frac{1}{3}

分式相乘:

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

= \frac{1 \cdot 1}{3 \cdot 3}

数字相乘:

1 \cdot 1 = 1

= \frac{1}{3 \cdot 3}

数字相乘:

3 \cdot 3 = 9

= \frac{1}{9}

= \frac{1}{9} \cdot 4

\frac{1}{9} \cdot 4 = \frac{4}{9}

\frac{1}{9} \cdot 4

将项转换为分式:

4 = \frac{4}{1}

= \frac{1}{9} \cdot \frac{4}{1}

使用分式法则:

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

= \frac{1 \cdot 4}{9 \cdot 1}

数字相乘:

1 \cdot 4 = 4

= \frac{4}{9 \cdot 1}

数字相乘:

9 \cdot 1 = 9

= \frac{4}{9}

= \frac{4}{9}

= \frac{4}{9}

流行的例子

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

12 (0)^{2} - 12

1^{2} + 5 (1) + 4

(7/4+1/6)\div 3/4

(\frac{7}{4} + \frac{1}{6}) \div \frac{3}{4}

((-2)^4)/((3^2+2^2)^2)

\frac{( - 2 ) ^{4}}{( 3 ^{2} + 2 ^{2} ) ^{2}}