1 / 8

解 比 例

小学苏教版第 12 册. 解 比 例. 共青团路小学 傅 晓 2006 年 2 月. ⑶   ∶ 和 9∶12. 1. 1. 4. 3. 判断下面哪组中的两个比可以组成比例。. ⑴ 3∶4 和 1.5∶2. ( √ ). ⑵ 72∶8 和 1.2∶0.5. ( x ). ( √ ). ( ). =. 4. 15. 5. 根据比例的知识,在括号里填上合适的数。. 8∶2=24∶ ( ). 6. 12. 1. 1. 0.4. 1.2. 5. 4. =. ( ). 75.

isaiah
Download Presentation

解 比 例

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. 小学苏教版第12册 解 比 例 共青团路小学 傅 晓 2006年2月

  2. ⑶  ∶ 和9∶12 1 1 4 3 判断下面哪组中的两个比可以组成比例。 ⑴ 3∶4和1.5∶2 (√) ⑵ 72∶8和1.2∶0.5 ( x ) (√)

  3. () = 4 15 5 根据比例的知识,在括号里填上合适的数。 8∶2=24∶( ) 6 12

  4. 1 1 0.4 1.2 5 4 = ( ) 75 ( )里填什么数?说说 你的理由。 48∶ = 2.7∶0.9 ∶ = 5 ∶ 54∶ =9∶4 ( ) 16 ( ) 4 24 ( ) 25

  5. 54∶ =9∶4 ( ) x 54∶ = 9∶4 1.2 0.4 x 0.4 1.2 = 75 = ( ) 75

  6. 6 54×4 x= x=24 9 1.2 0.4 例3 解比例 。 1 x = 75 例2 解比例 。 解: 9 x= 54×4 54∶x = 9∶4

  7. 1.2 0.4 x = 75 6 54×4 x= x=24 9 1 解: 9 x= 54×4 解:1.2 x= 75×0.4 54∶x = 9∶4 x= 75×0.4÷1.2 x= 25

  8. 1.3 18 x 3.6 3 x 4 1 9 5 解下面的比例。 ⑴x∶2.4 = 5∶ ⑵ = ⑶ 7∶ =

More Related