009999991 rounded to 2 significant digits is 1.0e7
111.009mm rounded to four significant digits is 111.0mm
8 of them.
11225 g rounded off to 3 significant figures is 11200 g. You drop the 2 and the 5 because they are not significant in this case. It's like saying "bye Felicia" to those extra digits.
5 of them.
111.009 rounded to four significant digits is 111.0
111.0
1.0e3L
1042L rounded off to two significant digits is 1000L. The digit "1" in the hundreds place is the most significant digit, so the number is rounded down to 1000L.
686.88 rounded to 3 significant digits is 687
2,340,567 rounded to five significant digits is 2,340,600
009999991 rounded to 2 significant digits is 1.0e7
323.565 rounded to three significant digits is 323.56
1.239 rounded to 3 significant digits is 1.24
2711 rounded to 2 significant digits is 2700
1,040 to 3 s.f., or 1,040 (3 s.f.) or 1,040.
1,000 to 2 s.f., or 1,000 (2 s.f.) or 1,000.