100+5=105(米)
100÷5×(100+5)÷100
=20×105÷100
=21(圈)
答:当乌龟爬完1圈时,兔子跑了21圈.
故选:C.
兔子和乌龟在100米的环形跑道上赛跑.它们从同一地点同时出发,乌龟每爬行5米,兔子超过它一圈.当乌龟爬完一圈时,兔子跑了( )圈. A.18 B.20 C.21 D.22
兔子和乌龟在100米的环形跑道上赛跑.它们从同一地点同时出发,乌龟每爬行5米,兔子超过它一圈.当乌龟爬完一圈时,兔子跑了( )圈.
A. 18
B. 20
C. 21
D. 22
A. 18
B. 20
C. 21
D. 22
数学人气:634 ℃时间:2019-09-28 09:10:34
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