Rounding Off Using Number Line

1. Rounding Off Using Number Line Round off 115 to the nearest hundred 0 100 200 300 400 500 115 is between 100 and 200

2. Rounding Off Using Number Line Round off 115 to the nearest hundred X 115 100 120 140 160 180 200 115 is nearer to 100 than to 200 115 is when rounded off to the nearest hundred 100 115  100

3. Rounding Off Using Number Line Round off 650 to the nearest hundred 500 600 700 800 900 1000 650 is between 600 and 700

4. Rounding Off Using Number Line Round off 650 to the nearest hundred X 650 600 620 640 660 680 700 650 is halfway between 600 and 700 halfway 650 is when rounded off to the nearest hundred 700 650  700

5. Rounding Off Using Number Line Round off 874 to the nearest hundred 500 600 700 800 900 1000 ? ? 874 is between 800 and 900

6. Rounding Off Using Number Line Round off 874 to the nearest hundred X 874 ? 800 820 840 860 880 900 874 is nearer to 900 than to 800 874 is when rounded off to the nearest hundred 900 874  900

7. Rounding Off Using Number Line What are the other numbers that can be rounded off to 700 aside from 650? 650 670 690 700 600 620 640 660 680

8. Rounding Off Using Number Line What are the other numbers that can be rounded off to 700 aside from 650? 651 - 749 650 670 690 710 730 660 680 700 720 740 750 654 657 664 667 711 745 651 661 no 655 658 665 668 725 749 652 662 yes 656 659 666 669 735 649 653 663 no

9. 100 200 What are the numbers in the tens place that can be rounded off to the nearest hundred after the given number? 1 2 3 4 5 6 7 8 9 1 5 9 200  Example: 200 is the nearest hundred after 159 X 159

10. 600 700 What are the numbers in the tens place that can be rounded off to the nearest hundred after the given number? 1 2 3 4 5 6 7 8 9 6 7 7 700  Example: 700 is the nearest hundred after 677 X 677

11. 700 800 What are the numbers in the tens place that can be rounded off to the nearest hundred before the given number? 1 2 3 4 5 6 7 8 9 7 1 9 700  Example: 700 is the nearest hundred before 719 X 719

12. 900 1 000 What are the numbers in the tens place that can be rounded off to the nearest hundred before the given number? 1 2 3 4 5 6 7 8 9 9 4 8 900  Example: 900 is the nearest hundred before 948 X 948

13. The number of tourist who visited Singapore last year was 600 when rounded off to the nearest hundred. What could be the actual number of tourist be? 550 – 649 What could be the maximum number of tourist who visited Singapore last year? 550 650 500 600 700 580 620 650 550 no 590 630 560 540 no 549 610 570 640 no

14. The number of tourist who visited Singapore last year was 600 when rounded off to the nearest hundred. What could be the actual number of tourist be? 550 – 649 What could be the minimum number of tourist who visited Singapore last year? 550 650 500 600 700 580 620 650 550 no 590 630 560 540 no 610 570 640

15. Challenge The number of tourist who visited Singapore last year was 630 000 when rounded off to the nearest thousand. What could be the actual number of tourist be? 629 500 – 630 499 629 500 630 500 629 000 630 000 631 000 629 800 630 200 630 500 629 500 no 629 900 630 300 629 600 629 400 no 630 100 629 700 630 400