Grade 3_ Lesson 7: ordering numbers.pptx

Lesson 7: Ordering Numbers

1. Lesson 7 Ordering Numbers up to 10 000

2. Give the place value of the underlined number. 1. 3 6 8 2. 1 482 3. 7 45 4. 1 4 2 5 5. 93 6 Tens Hundreds Thousands Tens Ones Drill

3. More than Less than 2548 Put at the top of the circles If the given number is more than or less than the number at the center Review

4. More than Less than 2548 2598

5. More than Less than 2548 1956

6. More than Less than 2548 2196

7. More than Less than 2548 1090

8. More than Less than 2548 3010

9. Motivation Call on pupil volunteers to stand in front and arrange themselves from tallest to shortest. Ask: How many pupils are there? What do you notice about their arrangement? How are they arranged? Who can come up front and arrange all your classmates in order from tallest to shorter/shortest to tallest?

10. What if there is another number like 5 253? Where should it be placed so that the numbers are arranged from greatest to least? (Answer: between 6 392 and 4 354) 6 392 5253 4 354 Presentation

11. Why should it be placed in that position? (because 5 253 is less than 6 392, but greater than 4 354 and we are following the decreasing order) What if there is another number like 2 998? Where should it be placed? (Answer: after 4 354) Why? (to arrange the numbers in order from greatest to least) Remember that you are arranging the numbers from greatest to least.

12. Reinforcing the Concept Compare the numbers then arrange them from greatest to lowest. 3784 3804 3794 3824 3831 2) 3205 3245 7325 3225 3216 3831 3824 3804 3794 3784 7325 3245 3225 3216 3205

13. Summarizing the Lesson How do we arrange numbers in decreasing order? How do we arrange numbers in increasing order?

14. To arrange numbers in increasing or decreasing order , compare two numbers at a time, starting from left to right . Find out which is greater or lesser , then put them in the right order.

15. Applying to New and Other Situations 8 532 6 557 4321 2 345 Arrange the following numbers from greatest to lowest. 2 345 4 321 6 557 8 532

16. Applying to New and Other Situations 9 231 5 461 2 782 1 321 Arrange the following numbers from greatest to lowest. 5 461 2 782 9 231 1 321

17. Arrange the following numbers from greatest to lowest. 8 781 3 453 1 972 6 213 ______ ______ ______ ______ 2) 2 321 2 031 2 523 2 121 ______ ______ ______ ______ 3) 9 021 3 432 2 231 8 732 ______ ______ ______ ______

18. Write the numbers in the ladder box, from greatest to lowest. Start here:

19. from lowest to greatest. Start here:

20. Home Activity