Complete the following calculations Record the answer from calculator Round answer to correct # of SF’s

8.80 x 45.9 Calculated answer: 403.92 Correct SF’s: 404 Each number used in calculation has 3 SF’s

4.28 / 1.327 Calculated answer: 3.225320271 Correct SF’s: 3.23 4.28 has 3 SF’s, 1.327 has 4, answer can only have 3 SF

0.058 / 78.2 Calculated answer: 0.000741688 This is also reported as 7.41688x10-4 (the zeroes go away, not SF here) 7.41688E-4 Correct SF’s: 7.4x10-4 0.058 has 2 SF, 78.2 has 3

4.591 + 3.2 Calculated answer: 7.791 Correct SF’s: 7.8 4.591 has 4 SF, but 3.2 only has 2 SF

4.79-1.210 Calculated answer: 3.58 Correct SF’s: 3.58 4.79 has 3 SF, 1.210 has 4

Make the Following Metric Conversion Be able to show your work If you do the math way or moving decimal point way

840 mL  L 840 mL x (1L/1000mL) = 0.840 L Think about this, you’re converting a small unit, mL, to a larger unit, L. You will need fewer L to equal 840 mL. The answer here makes sense. M_ _KHD_dcm_ _ μ_ _ n

42.1648 km  mm Think, a large unit, km, converting to a small unit, mm. My number should get larger. 42.1648km x (1000m/1km) = 42164.8 m 42164.8 m x (1000mm/1m) = 42164800 mm M_ _KHD_dcm_ _ μ_ _ n

23.4 μm  cm 23.4μm x (1mm/1000μm) = 0.0234mm 0.0234mm x (1cm/10mm) = 0.00234cm M_ _KHD_dcm_ _ μ_ _ n