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2020վתвⱸ

2019-06-05 16:46:24| й

вϵ漰֪ʶ൱㷺һࡣܵһϵнϼұȽյĿ㣬ʱ򣬴ҿܻ΢һĿ˽ȥһ̡һĿܾͻ޴֣ǣ⣬ֻҪ3죬йרҽһ裬׽⡣

1һ׵Ҫ20ɣҵҪ10ɡ1죬Ȼҽ1죬ɼ׽1…˽湤ôö?

A.16 B.15 C.14 D.13

𰸡C

й蹤W=20P=1P=21ѭڵʱΪ2죬һѭڵЧʺΪ1+2=320÷3=6…2򾭹6ѭڣ6×2=12ʣ๤Ϊ2.13׹1ʣ2-1=1Ҽɡʹ12+1+0.5=13.5졣ˣѡC

Ŀֻ֪ߣ

1 ȷһڵʱЧ

2 ڵĸԼʣ๤

3 ĿҪʣ๤

2ӡһ׵Ҫ12СʱɣҵҪ15Сʱڣס׹1Сʱҹ2Сʱ;׹2Сʱҹ1Сʱ;׹1Сʱҹ2Сʱ……˽ȥӡⲿҪСʱ?

 

 

3һˮذװ˼סҡˮܡ򿪼׹ܣҪ12Ӱһˮſ;ҹܣҪ15Ӱһˮſ;򿪱ܣҪ20ܽһˮſաڣסҡţÿθ2ӣһˮſҪ೤ʱ?

A.14 B.14.5 C.15 D.15.5

𰸡B

й蹤W=60P=5P=4P=3һѭڵʱΪ2×3=6ӣһѭڵЧʺΪ(5+4+3)×2=2460÷24=2…12򾭹2ѭڣʣ๤Ϊ12׹ܹ2ӣ5×2=10ʣ๤2Ҫҹܷ2÷4=1/2СʱˣһˮſҪ12+2+0.5=14.5СʱˣѡB

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