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例1如果9+□>14,□里应该填怎样的数?(从下面选项中选出正确答案)①比5小的数②5③比5大的数[分析与解]本题的意思是:9加哪个数得数就大于147如果同学们不能直接从选项中找出正确答案,就把各个选项中的数试加,这样就能找到正确答案。可以这样想:①比5小的数:(有1、2、3、4)9+1=10,9+2=11,9+3=12,9+4=13,可见,比5小的数加9,得数都小于14,所以,比5小的数不是答案。②5:9+5=14,可见,5加9,得数正好等于14,所以,5也不是答案。
Example 1 If 9 +>> 14, what should be filled in □? (Select the correct answer from the following options) ① Less than 5 ② 5 ③ More than 5 [Analytical solution] The meaning of this question is: 9 Plus which number is greater than 147 If the students can not find the correct answer directly from the options, put the number of options in the test, so you can find the correct answer. Can think so: ① less than 5: (1, 2, 3, 4) 9 + 1 = 10,9 +2 = 11,9 +3 = 12,9 +4 = 13, we can see that smaller than 5 The number of plus 9, the number is less than 14, so the number of small than 5 is not the answer. ② 5: 9 +5 = 14, we can see that 5 plus 9, the number is exactly equal to 14, so 5 is not the answer.