沏茶问题练习题，作为课本上练习题的补充，主要培养学生合理安排时间的意识和能力。

１、妈妈下班做饭，淘米要3分钟，煮饭要30分钟，洗菜要8分钟，切菜要10分钟，炒菜要10分钟。如果煮饭和做菜用不同的锅和炉子，妈妈将饭菜都煮好至少要多少时间？

２、红红要为爸爸冲一杯咖啡，可是开水用光了，她需要烧开水（６分钟），找咖啡（１分钟）、洗茶杯（２分钟）。她该怎样安排才能尽快让爸爸喝上热咖啡？

３、早晨妈妈安排小敏自己用奶粉冲一杯牛奶，洗水壶要１分钟，洗杯子和汤匙各要１分钟，浇开水要１２分钟，取奶粉要１分钟。小敏怎样安排这些事情最合理，并且能使自己尽快喝上牛奶？

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