丙做试题|六年级奥数题及答案
甲、乙、丙三人共做了183道数学题,乙做的题比丙的2倍还少4道,甲做的题比丙的3倍多7道。丙做了多少道题?
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解答:所以丙做的题目为:(183+4-7)/(1+2+3)=30 道