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受欢迎的 Word Problems >

You type 168 words in 3 1/2 minutes. How many words do you type per minute?

解答

lcm

168, 3 \frac{1}{2}, d o

解答

84 d o

求解步骤

找到

168, 3 \frac{1}{2}, d o

的最小公倍数

因式分解

168

2^{3} \cdot 3 \cdot 7

分解

3 \cdot \frac{1}{2} : \frac{3}{2}

将最高次数乘以每个因数:

2^{3} \cdot 3 \cdot 7 \cdot \frac{1}{2} \cdot d o

化简

84 d o

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