1 / 41

EnVision Math Topic 2: Lesson 2-2 Estimating Sums and Differences 2010-11

EnVision Math Topic 2: Lesson 2-2 Estimating Sums and Differences 2010-11. Rocket Math. Rocket Math Partners. Ryan and Ariana Chelsie and Allison Maryan and Brandon Saul and Jayla Meadow and Mikayla Cameron, Jadyn & Ryan V.

Download Presentation

EnVision Math Topic 2: Lesson 2-2 Estimating Sums and Differences 2010-11

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. EnVision Math Topic 2: Lesson 2-2 Estimating Sums and Differences 2010-11

  2. Rocket Math

  3. Rocket Math Partners Ryan and Ariana Chelsie and Allison Maryan and Brandon Saul and Jayla Meadow and Mikayla Cameron, Jadyn & Ryan V. Matthew and Nicholas Elijah and Chase

  4. How can I estimate sums and differences?

  5. 600 300 645 + 253 = 900

  6. 400 100 398 + 121 = 500

  7. 600 400 563 + 375 = 1,000

  8. 5,000 2,000 5,317 + 1,734 = 7,000

  9. 6,000 4,000 6,324 + 3,842 = 10,000

  10. 70,000 20,000 72,694 + 17,789 = 90,000

  11. 1,300 200 1,250 + 204 = 1,500

  12. 540 30 542 + 27 = 570

  13. 300 200 288 - 171 = 100

  14. 5,000 3,000 5,323 – 2,611 = 2,000

  15. 70,000 40,000 73,088 – 44,444 = 30,000

  16. 40 890 892 - 35 = 850

  17. 1,700 700 1,724 - 731 = 1,000

  18. 2,000 2,000 1,931 – 1,884 = 0

  19. 1,900 1,900 1,931 – 1,884 = 0

  20. 1,930 1,880 1,931 – 1,884 = 50

  21. How can I estimate sums and differences?

  22. $5.00 $8.00 $4.95 + $8.39 = $13.00

  23. $9.00 $7.00 $9.45 - $6.72 = $2.00

  24. $20.00 $70.00 $24.66 + $72.19 = $90.00

  25. Let’s Practice!

  26. 200 500 219 + 544 = 700

  27. 90,000 30,000 86,128 – 28,017 = 60,000

  28. $9.00 $9.00 $8.79 + $9.13 = $18.00

  29. 1,600 900 1,576 - 910 = 700

  30. 7,000 6,000 7,299 + 5,846 = 13,000

  31. 8,000 2,000 8,112 – 1,511 = 6,000

  32. 1,400 300 1,415 + 337 = 1,700

  33. $80.00 $30.00 $78.50 - $31.99 = $50.00

  34. 80,000 60,000 84,735 + 58,175 = 140,000

  35. This year, 35,658 people ran in a marathon. Last year, 8,683 fewer people ran. About how many people ran last year? 36,000 9,000 35,658 – 8,683 = 27,000 people

  36. There are 152 students in grade 4 and 144 students in grade 5. About how many students are in grade 4 and 5? 200 100 152 + 144 = 300 students

  37. Alex sold 86 tickets to a school talent show on Thursday and 103 tickets on Friday. About how many tickets did Alex sell altogether? 90 100 86 + 103 = 190 tickets

  38. 500 + 900 = 1,400 Estimate 463 + 896. The sum is between which two numbers? A. 500 and 1,000 B. 1,000 and 1,500 C. 1,500 and 2,000 D. 2,000 and 2,500

  39. 1,000 + 800 = 1,800 Estimate 963 + 751. The sum is between which two numbers? A. 500 and 1,000 B. 1,000 and 1,500 C. 1,500 and 2,000 D. 2,000 and 2,500

More Related