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对于日历,我们并不陌生,你能找到3个连续日子,使其日期数相加等于54吗?如果你已经找到了答案,再试一试看哪4个连续日子的日期教相加也等于54呢?这两个问题不是太难,同学们稍加思考就可以得到答案.因为3个连续数,中间的数必然是前后两个数之和的一半,所以总数54被3除必然是中间那个日子的日期数,由此,3个连续日子应该是17日、18日、19日.当为4个连续数时,中间两个数之和必然等于边上两个数之和.这样就可以得到4个连续日子是12日、13日、14日、15日.
For calendars, we are no stranger to this. Can you find 3 consecutive days that add up to 54 dates? If you have found the answer, try again to see which 4 consecutive days have the same date plus 54 The two problems are not too difficult, students can get the answer with a little thought.Because the three consecutive numbers, the middle of the number must be half the sum of the two before and after, so the total number of 54 is divided by 3 must be the middle of that The date of the date, therefore, three consecutive days should be 17, 18, 19. When the number of 4 consecutive, the middle of the two numbers must be equal to the sum of the two edges. So that you can Get 4 consecutive days is 12, 13, 14, 15.