An interactive voting lesson using Qwizdom Student Response Systems

1. Estimation & Rounding Up

2. Front End & Rounding Estimation Strategies Next Page

3. Type your name and send: Next Page

5. Can I buy three for $100? 45 Next Page

6. Can I buy three for $100? $23 Next Page

7. Can I buy 5 for £50? £11.87 The basketball would have to cost ______ or less for me to purchase five of them for £50. Answer in pounds. Next Page

8. Can I buy three for $20? $ 4.95 CHECKERS Next Page

9. Rounding to the highest Place Value Round each number to its highest possible place value. Some numbers will be rounded to ten- thousands , thousands , hundreds , or tens . Next Page

11. Round to the highest place. Next Page Write on board 375 Hundreds 400 26 Tens 30 1,427 Thousands 1,000 216 Hundreds 200

12. After you round, add the numbers! 400 30 1000 + 200 1630 Next Page

13. 8857 4758 7045 + 2110 8857 4758 7045 + 2110 Round each number to the highest place value? 9000 5000 7000 + 2000 Next Page

15. 247 6542 489 + 92 247 6542 489 + 92 Round each number to the highest place value? 200 7000 500 + 90 Next Page

17. 5028 6732 1285 + 835 Round each number to the highest place value? 5000 7000 1000 + 800 5028 6732 1285 + 835 Next Page

18. Front End Estimation Estimation Strategy Next Page

20. 4,32 0 74 0 2,39 0 + 2 0 4,329 748 2,398 + 28 Draw a line through your list of numbers so that you have at least one digit from each addend in front of (before) the line. Change all numbers after the line to zeros. All numbers before the line stay the same. Next Page

22. 8857 4758 7045 + 2110 8857 4758 7045 + 2110 Use the front end estimation strategy. 8 000 4 000 7 000 + 2 000 Next Page

23. 8857 4758 7045 + 2110 8857 4758 7045 + 2110 8 000 4 000 7 000 + 2 000 Very EASY when the addends have the same number of digits Draw the line after the first number In each addend. Next Page

25. 247 6542 489 + 92 247 6542 489 + 92 240 6540 480 + 90 Use the front end estimation strategy. Next Page

27. 5028 6732 1285 + 835 Use the front end estimation strategy. 50 00 67 00 12 00 + 8 00 5028 6732 1285 + 835 Next Page

29. 3,876 5,814 3,176 + 7,895 4, 000 6, 000 3, 000 + 8, 000 3, 000 5, 000 3, 000 + 7, 000 Which one rounds to the highest place value? A B Next Page

30. 9,876 8,514 6,092 + 3,895 9, 000 8, 000 6, 000 + 3, 000 10, 000 9, 000 6, 000 + 4, 000 Which one rounds to the highest place value? A B End of show