Significant Digits   Answers Practice Problems Level 2 1.  How many significant digits are there in each of the following measurement? a.   3.58 g f.    804.58 kg b.  14.809 cm g.   0.007832 cg c.   107.334 km h.   130,004.5 mm d.   0.0004898 mm i.    250.00 km e.   3000 cm j.    14.380 s 2.  Express the answer to each of the following calculations with the correct number of significant digits. a.   82.5 cm + 13.56 cm f.    13.80 cm - 6.0741 cm b.   16.8892 km + 3.5 km g.    8.472 cg - 1.440 cg c.   45.456 g + 3.56 g h.   30 s - 1.442 s d.   106.22 mm + 80.0 mm i.    54.00 g - 30.2020 g e.   30.44 kg + 3.9422 kg j.    1.45050 kg - 0.00667 kg 3.  Express the answer to each of the following calculations with the correct number of significant digits. a.   8.4 cm X 3.58 cm f.    35.068 km3 ÷  5.7 km b.   1.075 m X 2.0 m g.   85.0869 m2  ÷  9.0049 m c.   3.0899 mm X 22.4 mm h.    0.00826 cm2  ÷  0.00033 cm d.   0.00457 cm X 0.18 cm i.     0.005600 mm2  ÷  0.200 mm e.   10.00 m X 84.767 m j.     3.4500 cm2   ÷ 450 cm