What is rounding? Rounding is deciding which ten, hundred or thousand a number is closest to.

Transcription

1 What is rounding? Rounding is deciding which ten, hundred or thousand a number is closest to.

2 1. Ask yourself What place am I rounding my number to? Nearest Ten? Nearest Hundred? Nearest Thousand? 2. Think Which two tens, hundreds or thousands does my number fall between? Examples: 32 falls between 30 and falls between 500 and ,492 falls between 7,000 and 8, Look What is the number just right of the place I am rounding to in my number? Examples: 32 Tens place is 3; right is Hundreds place is 5; just right is 7. 7,492 Thousands place is 7; just right is Decide *If the number right is 0,1,2,3 or 4 round down smaller number. *If the number right is 5,6,7,8 or 9 round up to the bigger number.

3 1. Ask yourself What place am I rounding my number to? **I am trying to decide which multiple of ten, hundred or thousand my number is the closest to. What is the Nearest Ten? Nearest Hundred? Nearest Thousand? Examples: *I want to round 32 *I want to round 485 *I want to round 3,014

4 2. Think Which two tens, hundreds or thousands does my number fall between? * * * ,000 Examples: *32 falls between 30 and 40. (30 40) *576 falls between 500 and 600. ( ) *7,492 falls between 7,000 and 8,000. (7,000 8,000)

5 3. Look What is the number JUST right of the place I am rounding to in my number? Examples: 32 Rounding ten; Tens place is 3; just right is Rounding hundred; Hundreds place is 5; just right is 7. 7,492 Rounding thousand; Thousands place is 7; just right is 4.

6 3. Decide **If the number right of the place you are rounding to is 0,1,2,3 or 4 round smaller number, OR **If the number right of the place you are rounding to is 5,6,7,8 or 9 round larger number. Examples: *32 comes between 30 and 40. It rounds to 30 which means it is closer to comes between 500 and 600. It rounds to 600 which means it is closer to ,492 comes between 7,000 and 8,000. It rounds to 7,000 which means it is closer to 7,000.

7 Name: Task Cards

8 Round 17 to the Round 22 to the Round 29 to the Round 33 to the Round 38 to the Round 45 to the Round 51 to the Round 54 to the

9 Round 56 to the Round 60 to the Round 66 to the Round 72 to the Round 79 to the Round 88 to the Round 92 to the Round 97 to the

10 Round 103 Round 179 Round 219 Round 284 Round 327 Round 399 Round 431 Round 460

11 Round 548 Round 555 Round 610 Round 682 Round 725 Round 773 Round 847 Round 891

12 Round 875 Round 1,267 Round 1,550 Round 1,018 Round 2,260 Round 2,806 Round 3,113 Round 3,639

13 Round 4,382 Round 4,991 Round 5,400 Round 5,712 Round 6,099 Round 7,165 Round 8,340 Round 9,777

14 Number Round-Up! Directions: 1. Each player gets a game board and starts with 10 points. 2. On your turn draw a number card from the pile and write the number in the correct box on your own game board. 3. On either side of the number write the tens, hundreds or thousands that number falls between. 4. Round the number TEN, HUNDRED or THOUSAND and write the answer on your board. 5. If you round up, add 1 to your previous score. 6. If you round down, subtract 1 from your previous score. 7. The winner is the player who has the highest score after ten turns. 8. Something to think about: What will you do if you draw a multiple of ten, hundred or thousand? EXAMPLE: Ten, Hundred or Thousand The number I drew was Ten, Hundred or Thousand My number rounds up or down? My Score (Start with 10 points) up down up 11

15 Name Number Round-Up! Ten, Hundred or Thousand The number I drew was Ten, Hundred or Thousand My number rounds up or down? My Score (Start with 10 points)

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30