格式e.g.:
列式
= XXXXX
=XX
∴the distance between Place A and Place C is XX km .
原帖由 正負 於 30-8-2008 15:33 發表
25x 的平方 is ???
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Place A is 8km due west of Place B . Place C is 6km due south of Place B .
1. Find the distance(距離) between Place A and Place C .
2.Find ...
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