1 / 10

下列括号里最大能填几? 60×( )< 260 80×( )< 450 40×( )< 135 20×( )< 208 90×( )< 729

下列括号里最大能填几? 60×( )< 260 80×( )< 450 40×( )< 135 20×( )< 208 90×( )< 729. 4. 5. 3. 10. 8. 20 ) 60. 30 ) 200. 60. 用整十数除. 计算: 200÷30. 60 ÷ 20=. 3. 3. 0. “ 整十数除法 ” 试商的方法 1、笔算除法要注意商的位置。用整十数除商是一位数时,要先看被除数的前两位,如果前两位比除数小,就要看前三位,商写在被除数的个位上; 2、记住:余数必须比除数小。.

Download Presentation

下列括号里最大能填几? 60×( )< 260 80×( )< 450 40×( )< 135 20×( )< 208 90×( )< 729

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. 下列括号里最大能填几? • 60×( )< 260 • 80×( )< 450 • 40×( )< 135 • 20×( )< 208 • 90×( )< 729 4 5 3 10 8

  2. 20)60 30)200 60 用整十数除 计算: 200÷30 60÷20= 3 3 0

  3. “整十数除法”试商的方法 1、笔算除法要注意商的位置。用整十数除商是一位数时,要先看被除数的前两位,如果前两位比除数小,就要看前三位,商写在被除数的个位上; 2、记住:余数必须比除数小。

  4. 23 )7 1 四舍五入法试商 71÷23= 想: 20×3<70 3…… 2 3 6 9 2

  5. 如何计算:430÷62=?

  6. 四舍五入法试商

  7. 四舍五入法试商

  8. 四舍五入法试商

  9. 韩信分油 http://www.slyz.net/jxjd/jckt/jxff/chxfy.htm

More Related