(3-1)×2+1,
=4+1,
=5(楼);
答:小明上到5楼.
故答案为:5.
小明上楼的速度是爷爷的2倍,当爷爷上到3楼时,小明上到_楼.
小明上楼的速度是爷爷的2倍,当爷爷上到3楼时,小明上到______楼.
数学人气:821 ℃时间:2019-08-21 20:04:09
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