Maths estimating

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    29-Nov-2014
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Transcript of Maths estimating

  • 1. Estimating

2. 3+5x2 =16

  • True or False

3. 7-3x2=1

  • True or False?

4. 5x6+2=32

  • True of False?

5. (10-4)x3 = 18

  • True or False?

6. 4+4x2 = ? 7. 3+4x5-6 8. (3+4)x5-6 9. 4+3x2 10. 3+155-4x2 11. 40x3 12. 50x70 13. 120x20 14. 60030 15. 2408 16. 160040 17. 4500090 18. Write three thousand and seven in figures. 19. Write two hundred and thirteen thousand, four hundred and seventeen in figures. 20. 278x41

  • What number would you use to estimate 278?
  • A 280
  • B 270
  • C 300

21. 278x41

  • What number would you use to estimate 41?
  • A 40
  • B 50
  • C 41

22. 278x41

  • What do you estimate the answer to be?

23. 31.97x 17.21

  • What number would you use to estimate the 31.97?

24. 31.97x 17.21

  • What number would you use to estimate the 17.21?

25. 31.97x 17.21

  • What do you estimate the answer to be?