E Rounding to the nearest 10 4837 4832

E Rounding – to the nearest 10 4837 4832 No 4830 5 or more? Yes 4840 195 5 or more? Yes 200 5 or more?

E Rounding – to the nearest 100 5872 158231 No 5 or more? Yes Your Turn 5 or more? Yes 5900 158200 § Copy & complete this table: 89 Number 5 or more? 100 To nearest 1000 37 521 37520 37500 38000 274 503 274500 275000 7 630 918 7630920 7630900 7631000 9 875 9880 450 9900 10000 500 0 452

D Rounding to 1 Decimal Place (1 DP) 4. 8325 No 5 or more? 4. 8425 No 5 or more? 4. 852 Yes 5 or more? 4. 8 4. 9 4. 87 5. 26714 1. 967 Yes 4. 9 5 or more? Yes 5. 3 5 or more? Yes 2. 0 5 or more?

D Rounding to Decimal Places: 2 DP 4. 8325 No 5 or more? 4. 846 Yes 5 or more? 4. 85951 Yes 5 or more? 4. 83 4. 85 4. 86 1. 6949 5. 2671 1. 897 No 1. 69 5 or more? Yes 5. 27 5 or more? Yes 1. 90 5 or more?

D Rounding to Decimal Places: 3 DP 4. 8325 Yes 5 or more? 4. 8462 No 5 or more? 4. 8595 Yes 5 or more? 4. 833 4. 846 4. 860 1. 6942 5. 2627 1. 9999 No 5 or more? 1. 694 Yes 5 or more? 5. 263 Yes 5 or more? 2. 000

Rounding to Decimal Places 4. 852 1. 6949 5 or more? Yes 4. 9 Your Turn 1 DP D Number 5. 2627 5 or more? No 1. 69 § Copy & complete this table: 2 DP Yes 3 DP 5 or more? 5. 263 To 1 DP To 2 DP To 3 DP 63. 4721 63. 5 63. 472 87. 6564 87. 7 87. 66 87. 656 149. 9875 150. 0 149. 99 149. 988 3. 54029 3. 540 0. 59999 0. 600

C Significant Figures: Important Zeros in Numbers a. 5 2 0 0 0 b. 5. 2 0 0 c. 0 5 0 d. 0 2 . 5 0 Which zeros matter? Are there any we could get rid of and still have the same value? When dealing with Significant Figures, you need to keep any zeros that tell us the value of a number

C Rounding to 1 Significant Figure (1 SF) 0. 0765 Yes 5 or more? 587 241 200 No 5 or more? Yes 1. 0095 5 or more? 0. 001 0. 08 No 0. 0012 5 or more? 600 No 5 or more? 1 75 Yes 80 5 or more?

C Rounding to 2 Significant Figure (2 SF) 1472 Yes 5 or more? 1500 42728 Yes 5 or more? 43000 1. 4279 No 5 or more? 0. 0535 Yes 5 or more? 1. 4 0. 054 204478 0. 0696 5 or more? No 200000 Yes 0. 070

C Rounding to 3 Significant Figure (3 SF) 0. 02671 No 5 or more? 0. 0267 13798 Yes 5 or more? 13800 3. 2949 No 5 or more? 34728 No 5 or more? 3. 29 34700 974978 12. 069 5 or more? Yes 975000 Yes 12. 1

Rounding to Significant Figures 0. 0765 1 SF 42728 5 or more? Yes Your Turn § Copy & complete this table: C 43000 Number 3 SF 12. 069 5 or more? Yes 0. 08 2 SF To 1 SF 5 or more? Yes 12. 1 To 2 SF To 3 SF 6. 3528 6. 35 6. 4 6 34. 026 34. 0 34 30 0. 005708 0. 00571 0. 0057 0. 006 150. 932 151 150 200 0. 00007835 0. 0000784 0. 000078 0. 00008