1 / 5

Урок 4

Урок 4. Приемы быстрого счета. Прибавь и вычти!. (a + n) + (b - n)=. а + b = c. с. = a + n + b - n=. 4654 + 998. = ( 4654 -2) + ( 998 +2) =. = 465 2 + 1000. = 5 65 2. Прибавь или вычти!. (a + n) - (b + n)=. а – b = c. = a + n - b - n=. с. 4654 – 998.

aidan-sweet
Télécharger la présentation

Урок 4

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. Урок 4 Приемы быстрого счета

  2. Прибавь и вычти! (a+n) + (b - n)= а + b=c с = a+n + b - n= 4654 + 998 = (4654 -2) +(998+2) = = 4652+1000 = 5652

  3. Прибавь или вычти! (a+n) - (b + n)= а –b=c = a+n - b - n= с 4654 – 998 = (4654 + 2) -(998+2) = = 4656-1000 = 3656

  4. Прибавим и вычтем 847 + 999 = Прибавим или вычтем при вычитании. 4654 – 998 = 345 -103 =

  5. Повторим 1.Выполнить сложение чисел на числовой прямой: 2.Выполнитьсложение: -562 - 745

More Related