展开 13*(30-(60)/pi)

解答

展开

13 \cdot (30 - \frac{60}{π})

390 - \frac{780}{π}

十进制

141.71828 \dots

求解步骤

13 (30 - \frac{60}{π})

使用分配律:

a (b - c) = ab - a c

a = 13, b = 30, c = \frac{60}{π}

= 13 \cdot 30 - 13 \cdot \frac{60}{π}

化简

13 \cdot 30 - 13 \cdot \frac{60}{π} : 390 - \frac{780}{π}

= 390 - \frac{780}{π}

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