1 / 4

6+2= 9+1= 5+4= 60+20= 90+10= 20+40=

6+2= 9+1= 5+4= 60+20= 90+10= 20+40=. 8. 10. 9. 80. 100. 60. 春天到了，原来有 18 只燕子， 飞来了 30 只燕子，现在有几只小 燕子？. 算一算 想一想. 49+10= 10+21= 10+27= 49+20= 20+21= 27+30= 49+30= 70+21= 50+27=. 59. 31.

donnel
Download Presentation

6+2= 9+1= 5+4= 60+20= 90+10= 20+40=

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+2= 9+1= 5+4= 60+20= 90+10= 20+40= 8 10 9 80 100 60

  2. 春天到了，原来有18只燕子， 飞来了30只燕子，现在有几只小 燕子？

  3. 算一算 想一想 49+10= 10+21= 10+27= 49+20= 20+21= 27+30= 49+30= 70+21= 50+27= 59 31 37 69 41 57 79 91 77 一个加数不变，另一个加数增加10，和就增加10。 一个加数不变，另一个加数增加20，和就增加20。 一个加数不变，另一个加数增加50，和就增加50。 一个加数不变，另一个加数增加几，和就增加几。 （减少） （减少）

  4. 考考你 □2+10=□2 □6+20=4□ □1+□0=□□

More Related