一道小学数学题，发到群里，看谁会？
朋友们好，
又到动脑时间啦！
今天的题有点难，
但很有水平，
赶紧来挑战一下吧！
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朋友们好，
又到动脑时间啦！
今天的题有点难，
但很有水平，
赶紧来挑战一下吧！
