Well, honey, the value of 004 is simply 4. When you see a number with a leading zero like that, it's just fancy dressing with no real substance. So, in this case, strip away the zeros and you're left with good old 4.
004 is the same as 4
.004 int.,.006 ex.
.004
987 multiplied by 004 is 3,948
0.04
.004
0.4 is 0.36 more than 0.04
.004 kg is 4 grams
.004 + 3 + .03 = 3.034
No
4.00 is bigger than .004 which is the same as 0.004
3.74 is 3 units, 7 tenths and 4 hundreths. The 4 is the second decimal place.