0.750
You can't round that to the nearest thousandths because there is no thousandths place in the decimal.
0.00075
45.0099 rounded the nearest thousandths is 45.010
84.091
3.019
38.658
0.134
45.0099 rounded the nearest thousandths is 45.010
It is already rounded to the nearest hundred thousandths. Rounded to the nearest thousands would be 87.381.
42.746
37.210
329.546
0.968
100.000
3.299
51.550
342.964
409.020
0.200