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受欢迎的初等代数 >

80-(70%× 80)

解答

80 - (70% \cdot 80)

解答

24

求解步骤

80 - (70% \cdot 80)

遵循 PEMDAS 运算顺序

计算括号内的值

(70% \cdot 80) : 56

70% \cdot 80

乘除（左右）

Convert

70%

into a fraction:

\frac{70}{100}

70%

Rewrite

70%

as

\frac{70}{100}

= \frac{70}{100}

= \frac{70}{100} \cdot 80

消掉

\frac{70}{100} : \frac{7}{10}

\frac{70}{100}

因式分解数字:

70 = 10 \cdot 7

= \frac{10 \cdot 7}{100}

因式分解数字:

100 = 10 \cdot 10

= \frac{10 \cdot 7}{10 \cdot 10}

约分:

10

= \frac{7}{10}

= \frac{7}{10} \cdot 80

\frac{7}{10} \cdot 80 = 56

\frac{7}{10} \cdot 80

将项转换为分式:

80 = \frac{80}{1}

= \frac{7}{10} \cdot \frac{80}{1}

使用分式法则:

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

= \frac{7 \cdot 80}{10 \cdot 1}

消掉

\frac{7 \cdot 80}{10 \cdot 1} : 56

\frac{7 \cdot 80}{10 \cdot 1}

数字相乘:

10 \cdot 1 = 10

= \frac{7 \cdot 80}{10}

数字相除:

\frac{80}{10} = 8

= 7 \cdot 8

数字相乘:

7 \cdot 8 = 56

= 56

= 56

= 56

= 80 - 56

加减（左右）

80 - 56 : 24

80 - 56

80 - 56 = 24

= 24

= 24

流行的例子

4 - 2 (8 - 11) + 16

8× 2+5^2-3× 2

8 \times 2 + 5^{2} - 3 \times 2

(+ 5) + (- 3) - (- 9)

(4) - (+ \frac{4}{5} - \frac{3}{4})

4+6\div 2-5^2+4+6

4 + 6 \div 2 - 5^{2} + 4 + 6