×1=1,所以是1的倒数 .(判断对错)
写出下列格数的相邻整百数。( ),345,( ) ( ),456,( )( ),269,( ) ( ),987,( )
写出下列格数的相邻整百数。( ),425,( ) ( ),678,( )( ),123,( ) ( ),890,( )
写出下列格数的相邻整百数。( ),430,( ) ( ),675,( )( ),870,( ) ( ),999,( )
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,( )