1、试一试。

  

( )个正方形
( )个三角形
( )个正方体

  

( )____( )=( )
( )_____( )=( )

 2、看图列式。

  

( )____( )=( )
( )_____( )=( )

  

( )____( )=( )
( )_____( )=( )

  

( )____( )=( )
( )_____( )=( )

  

( )____( )=( )
( )_____( )=( )

  

( )+( )=( )
( )+( )=( )
( )-( )=( )
( )+( )=( )

  

____________________
___________________

  

_____________________
__________________

  

_____________________
__________________

  

_____________________
___________________

  

_____________________
___________________