1. Step One: Do the math. Step Two: Identify the number of significant figures within the problem set. Step Three: Convert your answer to the lowest number of sig figs as found within the problem set.

2. 12 + 23 + 127 = __________ 3.111 + 3.11 + 3.1 = __________ 1237.6 + 23 + 0.12 = __________ 43.65 - 23.7 = __________ 999.0 + 1.7 – 43.7 = __________

3. 12 + 23 + 127 = 162 (calc & corr) 3.111 + 3.11 + 3.1 = 9.321 (calc) 9.3 (corr) 1237.6 + 23 + 0.12 = 1260.72 (calc) 1261 (corr) 43.65 - 23.7 = 19.95 (calc) 20.0 (corr) 999.0 + 1.7 – 43.7 = 957 (calc) 957.0 (corr)

4. 45.37 x 0.00495 = 2.40 x 6397 = 2.40 x 0.3000 =

5. 45.37 x 0.00495 = 0.2245815 (calc) 0.225 (corrected) 2.40 x 6397 = 15352.8 (calc) 1.54 x 10 4 (corrected) 2.40 x 0.3000 = 0.72 (calc) 0.720 (corrected)

6. 32.5 / 4.0 = (4.5 x 6.3) / 7.22 = 42.5 / 5.00 = (0.0240 x 4352) / 17.408 =

7. 32.5 / 4.0 = 8.125 (calc) 8.1 (corrected) (4.5 x 6.3) / 7.22 = 3.9265927 (calc) 3.9 (corrected) 42.5 / 5.00 = 8.5 (calc) 8.50 (corrected) (0.0240 x 4352) / 17.408 = 6 (calc) 6.00 (corrected)