1. Significant Figures Multiplying and dividing

2. Multiplying and Dividing with Significant Figures When multiplying or dividing numbers round the answer to the least number of significant figures found in any of the numbers used. 1.Combining numbers- you are as good as your worst number! V=distance time V=25.3698 m 2.0 min 6 sig figs 2 sig figs = 13 m/min

3. Multiplying and Dividing with Significant Figures When multiplying or dividing numbers round the answer to the least number of significant figures found in any of the numbers used.. 2. 2.5463 x6.554x2.3x 5.322 2.3361.57.896 must round to 2 sig figs like = 7.3832 =7.4

4. Multiplying and Dividing with Significant Figures When multiplying or dividing numbers round the answer to the least number of significant figures found in any of the numbers used. 3.3. 5.33 x 10 -8 x 6.554 x 10 6 x 2.31 x 10 -15 2.336 x 10 5 1.53 x 10 -11 22.6 x 10 -11

5. 4. Evaluate 1.555 x 10 -10 x 4.22 x 10 9 x 5.66 x 10 -7 x 3.858 x 10 4 5.953 x 10 5 6.8 x 10 -8 9.35 x 10 -3 0.38 x 10 2

6. TRY 5.5. 8.445 x 10 -10 x 6.449 x 10 9 x 1.66 x 10 -9 x 7.858 x 10 4 8.953 x 10 5 2.666 x 10 -4 5.566 x 10 -3 5.35 x 10 -4

7. Remember BEDMAS: When you have to solve an equation with many orders Of operations, follow BEDMAS. Divide and multiply before you add and Subtract. 50.35 x 0.106 – 25.37 x 0.176 = ? STEP 1: 50.35 x 0.106 = 5.3371= 5.34 25.37 x 0.176 = 4.46512= 4.47 STEP 2: 5.34 – 4.47 = 0.87  2 sig figs after the decimal

8. When operations are mixed x or % comes before + or – For x or % you follow the rule(least number of sig figs) For + or – you follow the rule( least number of decimal places) You take it step by step

9. Homework –For practice Hebden: Page 39 #56 (B,C,E,F,H,K) Page 40 #58 (B,C,F,H,J,) Page 40 #59 (a, d, e, g)

11. WE ARE DONE UNIT 2!!!!!!