[案例](片段)题目:一个大月饼平放在桌上,用刀往下切。切一刀分成2块,切2刀最多分成4块,切3刀最多分成几块?师:谁能很快地说出结果?生_1:(脱口而出)6块。(随后补充)切一刀分成2×1=2(块),切 2刀分成2×2=4(块),切3刀应该分成2×3=6(块)。生_2:6块不正确。因为题目中要求最多能切成几块,6块不算多,应该是7块。生_3:到底谁对谁错,只要在图上画一画就知道了。师:我同意他(生_3)的看法。大家动手实践一 [Case] ​​(fragment) Title: A large moon cake flat on the table, cut down with a knife. Cut into two knives, cut into two knives up to four, cut into three knives divided into several? Teacher: Who can quickly say the result? Health _1: (blurted out) 6. (Subsequent addition) Cut a knife into 2 × 1 = 2 (block), divide 2 knife into 2 × 2 = 4 (block), cut 3 knife should be divided into 2 × 3 = 6 (block). Health _2: 6 is not correct. Because the subject requirements can be cut into a few blocks, six is ​​not much, it should be seven. Health _3: Who is wrong in the end, just draw a picture on the map to know. Teacher: I agree with him (Health _3) view. Everyone hands-on practice one