Rounding LO Round decimals to the nearest whole

Rounding LO: Round decimals to the nearest whole number or to 1 or 2 decimal places WILF: Round these numbers to the nearest whole number: Nearest ten pounds 483. 7 14511. 3 0. 5663 0. 4211 13. 773 0. 02891 Keywords Round £ 349. 21 to the: Nearest hundred pounds Round these numbers to the nearest 1 decimal place and 2 decimal places: 483. 7 14511. 3 0. 5663 0. 4211 13. 773 0. 02891 Approximately Round Decimal Tenth Place Whole Estimate Number

Rounding Starter: 1 Round the following numbers to the nearest 10. a 34 b 30 2 90 482 b 500 3467 d 3470 397 400 709 c 700 3467 d 3500 19, 952 20, 000 Round the following numbers to the nearest 1000. a 8660 9000 Problem c Round the following numbers to the nearest 100. a 3 86 b 23, 251 23, 000 c 351, 874 352, 000 d 999, 999 1, 000 At a football match, there were 4486 fans at the game. What is this to the nearest 100? At the match, 2156 hot drinks were sold. What is this to the nearest 1000?

Rounding Nearest Whole Number: eg 1 3 . 6 3 7 6 3 6 2 4 eg 2 8 85 4 5 86 .

Example Set 1: Rounding Round the following numbers to the nearest Whole Number 3 . 8 4 1 3 . 7 14 1 9 . 4 8 5 19 3 0 . 5 31 7 8 8 . 4 8 5 788

Exercise 1: 1 Round the following numbers to the nearest Whole Number a 9. 2 b 9 f 5. 56 102. 73 Problem Solving 103 c 8. 7 4 g 6 k 3. 6 16. 91 693. 715 694 0. 8 9 h 17 l d 29. 08 1 i 87. 48 29 m 825. 32 e 4 j 87 n 186. 577 825 187 4. 4 95. 901 96 n 1571. 49 1571 2 42, 354 people attended a football game. How many is this to the nearest 100? 42, 400 3 Mr and Mrs Smith won £ 3. 4 million in the lottery. What is this figure to the nearest million? £ 3 M 4 Lisa’s personal best on the long jump is 4. 78 m. What is this to the nearest metre? 5 m

Rounding Nearest 1 Decimal Place: eg 1 3 3. 6 . 6 4 7 6 3 6 2 3. 7 eg 2 8 85. 3 5 . 85. 4

Example Set 2: Rounding Round the following numbers to the nearest 1 decimal place 3 . 8 8 3. 9 1 3 . 7 4 13. 7 1 9 . 4 8 5 19. 5 3 0 . 5 7 30. 6 7 8 8 . 4 8 5 788. 5

Exercise 2: 1 Round the following numbers to the nearest 1 decimal place a 3. 58 b 3. 6 f 99. 94 693. 748 Problem Solving 693. 7 c 6. 5 g 99. 9 k 6. 45 0. 431 964. 258 964. 3 d 45. 12 18. 4 h 0. 4 l 18. 43 16. 462 45. 1 i 8. 999 16. 5 m 789. 975 e 78. 6 j 9. 0 n 1. 833333 790. 0 1. 8 78. 59 252. 541 252. 5 n 9. 666667 9. 7 2 Lisa’s personal best on the long jump is 4. 78 m. What is this to the nearest 1 decimal place? 4. 8 m 3 Usain Bolt ran the 100 m sprint in a time of 9. 58 seconds. What is this to the nearest split second (1 decimal place)? 9. 6 seconds 4 A number has been round to 1 decimal place to make 3. 4 Write the smallest possible value of the number. 3. 35

Rounding Nearest 2 Decimal Places: eg 1 3 3. 64 . 6 85. 36 7 6 3 6 2 3. 65 eg 2 8 4 5 . 85. 37

Example Set 2: Rounding Round the following numbers to the nearest 2 decimal places 3 . 8 8 6 3. 89 1 3 . 7 4 1 13. 74 1 9 . 4 0 6 9 19. 41 3 0 . 5 7 3 30. 57 7 8 8 . 4 9 5 788. 50

Exercise 3: 1 Round the following numbers to the nearest 1 decimal place a 3. 586 b 3. 59 f 13. 005 6. 9748 g 0. 6999 l 9. 64258 1. 477 d 1. 48 h 0. 70 6. 97 Problem Solving c 6. 45 13. 01 k 6. 452 16. 4624 9. 64 70. 70707 e 4. 51 i 16. 46 m 4. 512 8. 54056 16. 58 j 8. 54 n 70. 71 78. 9974 16. 578 0. 8181818 0. 82 n 79. 00 9. 666667 9. 67 2 The length of Tom’s garden is 8. 624 m. Round this length to the nearest cm (2 decimal places) 8. 62 m 3 Using a calculator work out the following and round your answer to 2 decimal places. a 4÷ 9 0. 44 b 23 ÷ 6 3. 83 c 37 ÷ 11 3. 36 d 15 ÷ 7 2. 14 e 128 ÷ 3 42. 67

Rounding Plenary: TRUE or FALSE for the following answers. Round this number to the nearest whole number. 3. 736 3 False Round this number to the nearest one decimal place. 4. 3061 4. 2 False Round this number to the nearest two decimal places. 17. 999 13. 00 True

Rounding Round decimals to the nearest whole number or to 1 or 2 decimal places WILF: Is the answer to: Round £ 349. 21 to the: Nearest hundred pounds Round these numbers to the nearest whole number: Nearest ten pounds 483. 7 14511. 3 0. 5663 0. 4211 13. 773 0. 02891 Round these numbers to the nearest 1 decimal place and 2 decimal places: Keywords Is the answer to: 483. 7 14511. 3 0. 5663 0. 4211 13. 773 0. 02891 Approximately Round Decimal Tenth Place Whole Estimate Number

Rounding Round each of these numbers to the nearest whole number 1 6. 9 2 18. 26 3 57. 641 4 199. 5005 Round each of these numbers to the nearest one decimal place 1 4. 73 2 13. 261 3 89. 999 4 126. 54862 Round each of these numbers to the nearest two decimal places 1 4. 739 2 11. 0285 3 109. 0909 4 325. 58223