1 / 11

参加跳绳的一共有多少人?

6. 6. 4. 2. 4. 2. 参加跳绳的一共有多少人?. 参加活动的一共有多少人?. 下面的 ○ 里能填上等号吗?. (15 + 5) + 8 ○ 15 + (5 + 8) (32 + 18) + 22 ○ 32 + (18 + 22). =. =. ( 28 + 17 ) + 23 = 28 + ( 17 + 23 ) ( 15 + 5 ) + 8 = 15 + ( 5 + 8 ) ( 32 + 18 ) + 22 = 32 + ( 18 + 22 ). 28. 17. 23. 28. 17. 23.

salma
Télécharger la présentation

参加跳绳的一共有多少人?

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. 6 6 4 2 4 2

  2. 参加跳绳的一共有多少人? 参加活动的一共有多少人?

  3. 下面的○里能填上等号吗? (15+5)+8○15+(5+8) (32+18)+22○32+(18+22) = =

  4. ( 28 + 17 )+ 23 = 28 +( 17 +23 ) ( 15 + 5 )+ 8 = 15 +( 5 + 8 ) ( 32 + 18 )+22= 32 +( 18+22 ) 28 17 23 28 17 23 1、仔细观察每组的两个算式,你有什么 发现? 2、你能自己再试着举一个这样的例子吗?

  5. 加法交换律 加法结合律 加法结合律 加法交换律 加法结合律

  6. 你能在 里填上合适的数吗? 96+35=35+ 204+57= +204 (45+36)+64= 45+( + ) 560+(140+70)=(560+ )+ 121+a+64=121+( +64) (99+○)+☆=99+( + ) 96 57 36 64 140 70 a ○ ☆

  7. 计算比赛 45+(88+12) (45+88)+12

  8. 计算比赛 75+(48+25) (75+25)+48

  9. 考考你

More Related