三年级数学乘法口算题：看谁写的多
( )× ( )=400 ( )× ( )=400
( )× ( )=400 ( )× ( )=400
( )× ( )=400 ( ) × ( )=400
( )× ( )=200 ( )× ( )=200
( )× ( )=200 ( )× ( )=200
( )× ( )=200 ( )× ( )=200
( )× ( )=100 ( )× ( )=100
( )× ( )=100 ( )× ( )=100
( )× ( )=100 ( ) × ( )=100
