数学题：光华小学中、高年级共有学生600名，如果中年级派出本年级人数派出本年级学生人数的十六分之一去车站打扫卫生，这时还比高年级学生多20名。中、高年级原来各有多少名？

数学题解答：

此题可以用方程解答，设中年级学生有x人。根据“高年级学生人数+中年级学生人数＝600”列出方程：

(1 – 1/16)x – 20 + x = 600

31/16x – 20 = 600

x = 320

这是中年级学生人数，再算高年级学生人数：600 – 320 = 280（人）

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