34. Rules for Rounding Off 1.If the digit being removed is more than 5, the preceding digit increases by 1. –Eg. 5.379 rounds to _______ 3 Sig Figs

35. Rules for Rounding Off 1.If the digit being removed is more than 5, the preceding digit increases by 1. –Eg. 5.379 rounds to 5.38 3 Sig Figs

36. Rules for Rounding Off 2.If the digit being removed is less than 5, the preceding digit remains unchanged Eg. 5.343 rounds to______ 3 Sig Figs

37. Rules for Rounding Off 2.If the digit being removed is less than 5, the preceding digit remains unchanged Eg. 5.343 rounds to 5.34 3 Sig Figs

38. Rules for Rounding Off 3.If the digit being removed is 5….then we have a wee little problem In chemistry… –the preceding number increases by 1 if it is odd –the preceding number remains unchanged if it is even

39. Rules for Rounding Off Why so much fun with fives? –If you always round up on 5s then you will overestimate the quantity you are working with

40. Rules for Rounding Off 4.Be sure to carry two or more additional significant figures through a multi-step calculation and round off only the FINAL ANSWER Is that your final answer!!

41. HEBDEN Pg 37 #55 Pg 39 #56 Pg 40 #57-58 Assignment #7