等边三角形有 条高,每个内角是 度.
写出下列各数的相邻整十数。( ),359,( ) ( ),450,( )( ),625,( ) ( ),760,( )
写出下列各数的相邻整十数。( ),430,( ) ( ),675,( )( ),870,( ) ( ),999,( )
写出下列各数的相邻整十数。( ),789,( ) ( ),455,( )( ),320,( ) ( ),309,( )
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,( )