一个三角形的面积是18.2平方厘米,底是5.2厘米,高是( )厘米
写出下列各数的相邻整十数。( ),210,( ) ( ),900,( )( ),315,( ) ( ),426,( )
写出下列各数的相邻整十数。( ),390,( ) ( ),345,( )( ),310,( ) ( ),400,( )
写出下列各数相邻的数。( ),245,( ) ( ),345,( )( ),311,( ) ( ),756,( )
写出下列各数相邻的数。( ),324,( ) ( ),899,( )( ),598,( ) ( ),477,( )
写出下列各数相邻的数。( ),300,( ) ( ),199,( )( ),209,( ) ( ),155,( )