问题
解答题
3支等长的发夹接起来和4个等长的大头针接起来一样长．如果每个大头针长2.4厘米，每支发夹长多少厘米？
答案
设每支发夹长x厘米，根据题意可得方程：
3x=2.4×4，
3x=9.6，
x=3.2，
答：每支发夹3.2厘米．
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3支等长的发夹接起来和4个等长的大头针接起来一样长．如果每个大头针长2.4厘米，每支发夹长多少厘米？
设每支发夹长x厘米，根据题意可得方程：
3x=2.4×4，
3x=9.6，
x=3.2，
答：每支发夹3.2厘米．
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| Different countries and people have different manners. Here are some examples. If you visit a Chinese family. You should knock at the door first. When the door opens, you should not move before the host says "Come in, please." Before coming into the house in Japan, it is good manners to take off your shoes. In European countries, even if your shoes are very dirty, this is not done. In Britain, a guest always finishes the drink or the food to show that he enjoys it. This will make the host very pleased. | |||||||||||||||
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