To answer this type of questions, you need to refer to the place value chart I attached below.
All you need to do is to fill the cells with the corresponding number and add zeroes in the empty remaining cells with lower place holder values than the largest mentioned one.
(1):
you will write "1" in the cell of the hundred, "9" in the cell on the tens and "8" in the cell of the ones.
100 + 90 + 8 = 198
(2):
you will write "6" in the cell of the hundred thousands, "4" in the cell of ten thousands, "8" in the cell of thousands, "7" in the cell of hundreds, "9" in the cell of tens and "4" in the cell of ones.
648794
(3):
you will write "3" in the cell of the hundred million, "8" in the cell of ten millions, "5" in the cell of the millions, "9" in the cell of the hundred thousands, "1" in the cell of the ten thousands, "6" in the cell of the thousands, "8" in the cell of the hundreds, "9" in the cell of the tens and "1" in the cell of the ones.
385,916,891
(4):
you will write "2" in the cell of the millions, "6" in the hundred thousands, "3" in the the cell of ten thousands, "0" in the cell of thousands, "9" in the cell of hundreds, "3" in the cell of the tens and "2" in the cell of the ones.
2,630,932
(5):
you will write "3" in the cell of hundred million, "7" in the cell of ten million, "2" in the cell of one million, "8" in the cell of the hundred thousands, "2" in the cell of the ten thousands, "6" in the cell of the thousands, "0" in the cell of the hundreds, "2" in the cell of the tens and "1" in the cell of the ones.
372,826,021
(6):
you will write "1" in the cell of the thousands, "5" in the cell of the hundreds, "1" in the cell of the tens and "7" in the cell of the ones.
1,517
(7):
you will write "8" in the cell of the hundred thousands, "6" in the cell of ten thousands, "3" in the cell of the thousands, "3" in the cell of the hundreds, "1" in the cell of the tens and "4" in the cell of the ones.
863,314
(8):
you will write "2" in the cell of the hundreds, "5" in the cell of the tens and "0" in the cell of the ones.
250
(9):
you will write "4" in the cell of the ten thousands, "6" in the cell of the thousands, "9" in the cell of the hundred, "4" in the cell of the tens and "7" in the cell of the ones.
46,947
(10):
you will write "5" in the cell of hundred millions, "4" in the cell of ten millions, "5" in the cell of the millions, "9" in the cell of the hundred thousands, "0" in the cell of ten thousands, "7" in the cell of the thousands, "6" in the cell of the hundreds, "2" in the cell of the tens and "0" in the cell of the ones.
545,907,620
(11):
you will write "9" in the cell of ten millions, "0" in the cell of the millions, "0" in the cell of hundred thousands, "2" in the cell of ten thousands, "5" in the cell of the thousands, "0" in the cell of the hundreds, "8" in the cell of the tens and "2" in the cell of the ones.
90,025,082
(12):
you will write "4" in the cell of ten thousands, "9" in the cell of the thousands, "1" in the cell of the hundreds, "0" in the cell of the tens and "9" in the cell of the ones.
49,109
(13):
you will write "7" in the cell of the thousands, "8" in the cell of the hundreds, "8" in the cell of the tens and "0" in the cell of the ones.
7,880
(14):
you will write "7" in the cell of the million, "2" in the cell of the hundred thousands, "9" in the cell of the ten thousands, "6" in the cell of the thousands, "6" in the hundreds, "5" in the tens and "5" in the ones.
7,296,655
(15):
you will write "5" in the cell of the thousands, "9" in the cell of the hundreds, "2" in the cell of the tens and "9" in the cell of the ones.
5,929
(16):
4 ten thousands, 0 thousands, 4 hundreds, 1 tens and 1 ones
40,411
(17):
1 millions, 2 hundred thousands, 3 ten thousands, 0 thousands, 2 hundreds, 3 tens and 8 ones
1,230,238
(18):
3 ten million, 9 million, 3 hundred thousands, 7 ten thousands, 3 thousands, 4 hundreds, 3 tens and 3 ones.
39,373,433
(19):
5 hundred thousands, 9 ten thousands, 9 thousands, 8 hundreds, 8 tens and 9 ones.
599,889
(20):
6 hundreds, 0 tens and 4 ones
604
(21):
2 millions, 7 hundred thousands, 9 ten thousands, 7 thousands, 6 hundreds, 0 tens and 9 ones
2,797,609
(22):
2 ten thousands, 3 thousands, 2 hundreds, 1 tens and 2 ones
23,212
(23):
5 hundreds, 0 tens and 1 ones
501
(24):
1 millions, 6 hundred thousands, 1 ten thousands, 3 thousands, 6 hundreds, 0 tens and 0 ones
1,613,600
(25):
3 ten millions, 3 millions, 1 hundred thousands, 1 ten thousands, 3 thousands, 7 hundreds, 4 tens and 5 ones
33,113,745
(26):
3 thousands, 5 hundreds, 1 tens and 4 ones
3,514
(27):
8 hundred thousands, 3 ten thousands, 0 thousands, 4 hundreds, 0 tens and 5 ones
830,405
(28):
1 millions, 1 hundred thousands, 4 ten thousands, 5 thousands, 0 hundreds, 9 tens and 0 ones
1,145,090
(29):
2 ten millions, 4 millions, 2 hundred thousands, 6 ten thousands, 3 thousands, 5 hundreds, 9 tens and 2 ones
24,263,592
(30):
8 hundreds, 7 tens and 9 ones
879
