1 / 3

运算定律

用加法结合律计算. (a+b)+c=a+(b+c). 运算定律. 32+45+68=( + )+. 456+113 -156=( ). 302+76+24 = = =. 596+218+482+104 = = =. 952-103 = 952-( ) =( ) - = =. 运算定律. 乘法结合律 (a xb)xc=ax(bxc). 65x32x25=(65x )x( x25). 60x45x5=( x )x.

rinah-solomon
Download Presentation

运算定律

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. 用加法结合律计算 (a+b)+c=a+(b+c) 运算定律 32+45+68=( + )+ 456+113 -156=( ) 302+76+24 = = = 596+218+482+104 = = = 952-103 = 952-( ) =( ) - = =

  2. 运算定律 乘法结合律 (axb)xc=ax(bxc) 65x32x25=(65x )x( x25) 60x45x5=( x )x 48x125 =( x )x125 =( x )x = = 64x125x25 =( x )x( x ) = = 25x16x8 = = =

  3. 运算定律 乘法分配律 ax(b+c)=axb+axc (a+b)xc=axc+bxc axb+a=ax(b+1) 32x83+32x17= x( ) 45x99+45= x( ) (40+32)x25= x 98×101 =98x( ) = = = 175×56＋25×56 = = = 38×99＋38 = = = 48×125 = = =

More Related