根据本节教学目的,我在教学中设计了以下几组习题,实践表明效果较好。一、复习概念,加深理解1.从低位到高位,按顺序说出个级、方级和亿级的每一个数位。2。从个位起,第几位是万位?第几位是亿位?3。千万位的左面一位是____位,右面的一位是_____位。4。用4、3、0、8、6五个数字组成最大的五位数是____,这个数中的“6”表示____。5。最大的七位数是____,最小的八位数是____,它们相差____。 According to the teaching purpose of this section, I designed the following groups of exercises in teaching, the practice shows that the effect is better. First, review the concept, to deepen understanding 1. From low to high, in order to say a level, square level and each level of hundreds of millions. 2. From the first place, what is the first place and what is the third place? Thousands of left one is ____ bit, the right one is _____ bit. 4. With 4, 3, 0, 8, 6 five-digit largest five-digit number is ____, the number of “6” said ____. 5. The largest seven digits are ____, the smallest eight digits are ____, and they differ by ____.