6000
79000
Easy, the commas separate the numerical units. 1,000 is one thousand. 1,000,000 is one million and so on.
1,045,620
If you put the commas in, you'll see that the number is 12,000. This is twelve thousand in spelling.
40005003 or 40,005,003 (with commas for readability)
130000
7000
79000
1000
Easy, the commas separate the numerical units. 1,000 is one thousand. 1,000,000 is one million and so on.
1,045,620
If you put the commas in, you'll see that the number is 12,000. This is twelve thousand in spelling.
140.000.000.000.000 (use commas in UK).
40005003 or 40,005,003 (with commas for readability)
6000000
Without the sentences provided, I can't determine which sentence uses commas correctly.
Oh, dude, you write 21 million 521 thousand 21 as 21,521,021. It's like counting to a really big number but with commas to make it look fancy. So, just slap those commas in there and you're good to go!