1 / 8

加、减法的估算

加、减法的估算. 教 师：许 娜. 复习： 1 、写出下列各数的近似数。 196 8006 3507 485 529 113 2999 74. 200. 8000. 3500. 490. 70. 530. 100. 3000. 复习： 2 、写出两个数之间的整千数。 1005 ＞ ( ) ＞ 998 2899 ＜ ( ) ＜ 3060

minerva-english
Download Presentation

加、减法的估算

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 加、减法的估算 教 师：许 娜

  2. 复习：1、写出下列各数的近似数。 196 8006 3507 485 529 113 2999 74 200 8000 3500 490 70 530 100 3000

  3. 复习： 2、写出两个数之间的整千数。 1005 ＞( ) ＞998 2899 ＜( )＜3060 3950＜( )＜4100 7015＞( )＞6997 3000 1000 4000 7000

  4. 180个 340个 第三、四周大约一共收集了多少个？ 192个 219个 500个送一次，大约再收集多少个，就可以送一次了？

  5. ～ ～ ～ ～ ～ ～ ～ ～ 417 1000 600 400

  6. 北京到大连， 飞机票620元， 火车票147元 ～ ～ ～ ～ ～ ～ 乘火车比乘飞机大约便宜（ ）元 500 450 470 620-147 620-147 620-147 600 100 600 150 150

  7. 187元 245元 245＋187 =432（元） 432元 ＞ 400元 答：400元买这两样东西不够。

  8. 通过今天的学习你有什么收获？

More Related