comparing big numbers

13,214 ........ 1,321

42,437 ........ 42,347

( Three milliard, two hundred fifty-two thousand, three hundred four . )

Is ............

( Three milliard ,two hundred fifty-two thousand, thirty -four )

( 50,000 ) = ( 500 thousands)

( Seventeen million, four hundred twenty-five thousand, six hundred five ).

Is......... ( 17,420,605)

( 400,000 + 30,000 + 2,000 + 20 + 1 ) ........ ( Four hundred twenty-three thousand, twelve)

( 3,412 ) = ( 3,□12 )

The missing digit is .....

The greatest number consists of the digits

( 3 , 9 , 0 , 1 , 5 ) is □□□□□

The smallest number formed from the digits

( 6 , 4 , 2 , 3 , 1 ) is □□□□□

( 198,00□ ) < ( 198,001 )

The missing digit is .....