教学内容:北师大版小学数学四年级下册第82～83页内容。教材分析:概率是研究不确定现象(随机现象)的科学。随机现象是指:在相同的条件下重复同样的试验,其试验结果不确定,以至于在试验之前无法预料哪一个结果会出现;但大量重复试验,其结果会出现一定的规律。概率学习的一个首要 Content: Beijing Normal University version of the elementary school mathematics fourth grade volumes 82 ~ 83 content. Textbook Analysis: Probability is the science of studying uncertain phenomena (random phenomena). Random phenomenon means that the same test is repeated under the same conditions, the test results are not sure, so that before the test can not be expected which results will appear; but a large number of repeated tests, the results will be a certain law. One of the most important aspects of probability learning