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受欢迎的初等代数 >

90+(70%× 90)

解答

90 + (70% \cdot 90)

解答

153

求解步骤

90 + (70% \cdot 90)

遵循 PEMDAS 运算顺序

计算括号内的值

(70% \cdot 90) : 63

70% \cdot 90

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 90

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 90

\frac{7}{10} \cdot 90 = 63

\frac{7}{10} \cdot 90

将项转换为分式:

90 = \frac{90}{1}

= \frac{7}{10} \cdot \frac{90}{1}

使用分式法则:

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

= \frac{7 \cdot 90}{10 \cdot 1}

消掉

\frac{7 \cdot 90}{10 \cdot 1} : 63

\frac{7 \cdot 90}{10 \cdot 1}

数字相乘:

10 \cdot 1 = 10

= \frac{7 \cdot 90}{10}

数字相除:

\frac{90}{10} = 9

= 7 \cdot 9

数字相乘:

7 \cdot 9 = 63

= 63

= 63

= 63

= 90 + 63

加减（左右）

90 + 63 : 153

90 + 63

90 + 63 = 153

= 153

= 153

流行的例子

- 2 \cdot (- \frac{3}{2}) + 2

\frac{5}{- 1 ^{2} + 4}

110-(40%× 110)

110 - (40% \times 110)

2^{21} - 2

\frac{9 ^{2} - 9}{9}