题目内容

小明上学路上用了15min,合______h,我校一节课的时间为40min,合______S.

①∵1min=
1
60
h,∴15min=15×
1
60
h=0.25h;
②∵1min=60s,∴40min=40×60s=2400s.
故答案为:0.25;2400.
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