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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 603 · 40 questions
TalentJR

How it works (Round and adjust): Round up: 49 is 50 − 1, 98 is 100 − 2. Multiply by the round number. Take away the number times the bit you added.

NameDateTime takenScore ___ / 40
  1. 1.10 × 49 =
  2. 2.14 × 9 =
  3. 3.11 × 9 =
  4. 4.14 × 29 =
  5. 5.10 × 19 =
  6. 6.6 × 29 =
  7. 7.37 × 99 =
  8. 8.29 × 98 =
  9. 9.6 × 29 =
  10. 10.16 × 98 =
  11. 11.15 × 19 =
  12. 12.3 × 49 =
  13. 13.13 × 9 =
  14. 14.7 × 9 =
  15. 15.35 × 99 =
  16. 16.9 × 49 =
  17. 17.4 × 29 =
  18. 18.6 × 49 =
  19. 19.3 × 29 =
  20. 20.15 × 29 =
  21. 21.31 × 98 =
  22. 22.8 × 29 =
  23. 23.11 × 49 =
  24. 24.7 × 99 =
  25. 25.3 × 29 =
  26. 26.9 × 9 =
  27. 27.8 × 29 =
  28. 28.12 × 29 =
  29. 29.10 × 29 =
  30. 30.26 × 98 =
  31. 31.10 × 9 =
  32. 32.11 × 9 =
  33. 33.5 × 49 =
  34. 34.28 × 99 =
  35. 35.33 × 98 =
  36. 36.8 × 9 =
  37. 37.30 × 99 =
  38. 38.5 × 9 =
  39. 39.11 × 19 =
  40. 40.9 × 19 =

Answer key

  1. 490
  2. 126
  3. 99
  4. 406
  5. 190
  6. 174
  7. 3663
  8. 2842
  9. 174
  10. 1568
  11. 285
  12. 147
  13. 117
  14. 63
  15. 3465
  16. 441
  17. 116
  18. 294
  19. 87
  20. 435
  21. 3038
  22. 232
  23. 539
  24. 693
  25. 87
  26. 81
  27. 232
  28. 348
  29. 290
  30. 2548
  31. 90
  32. 99
  33. 245
  34. 2772
  35. 3234
  36. 72
  37. 2970
  38. 45
  39. 209
  40. 171

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