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有的教师在讲除法“6136÷8”时,边讲、边问、边教演算方法:除数是一位数的除法先看除数哪一位?(最高位6)最高位的6够8除吗?(不够)怎么办呢?(移下1变成61除以8)商是几呢?(商7)应该写在哪里?(写在1字上面),61减去56余5,再移下几?(再移下3变成53)除以8商又是几呢?(商6)应该写将哪里呢?(写在3字上面)最后算出得数是767。从表面上看学生明白了,照葫芦能画出个瓢来,算起来也正确,但是学生对算理:6136里面的6是多少?6000被8除不够商1千,移下1来变成“61”表示多少呢?为什么商写在1的上面呢?……却很少能回答出来。
When some teachers say “6136 ÷ 8” in the division, they say, ask, and teach at the same time. Calculation method: Divisor is the one-digit divisor Which one of the divisors? (Highest 6) Highest 6 enough 8 (Remove 1 to 61 divided by 8) Where is the quotient? (Where quotient 7) should be written? (Written on the first word), 61 minus 56, then 5 (Remove 3 to 53) divided by the number of 8 is it? (Business 6) where should be written? (Written in 3 words) The final count is 767. Students see on the surface, according to gourd can draw a scoop, it seems correct, but the students on the arithmetic: 6136 which is the number of 6? 6000 is not divided by 8 1000, 1 down to become Why is “61”? Why is it written on 1? ... but rarely answered.