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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 336 · 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. 1.6 × 9 =
  2. 2.14 × 49 =
  3. 3.14 × 98 =
  4. 4.3 × 99 =
  5. 5.3 × 19 =
  6. 6.5 × 19 =
  7. 7.11 × 29 =
  8. 8.13 × 49 =
  9. 9.6 × 98 =
  10. 10.13 × 29 =
  11. 11.11 × 49 =
  12. 12.11 × 29 =
  13. 13.6 × 29 =
  14. 14.5 × 49 =
  15. 15.15 × 19 =
  16. 16.12 × 98 =
  17. 17.5 × 98 =
  18. 18.39 × 98 =
  19. 19.37 × 98 =
  20. 20.6 × 49 =
  21. 21.13 × 9 =
  22. 22.5 × 49 =
  23. 23.12 × 49 =
  24. 24.25 × 98 =
  25. 25.7 × 29 =
  26. 26.29 × 98 =
  27. 27.17 × 99 =
  28. 28.21 × 98 =
  29. 29.30 × 99 =
  30. 30.12 × 49 =
  31. 31.10 × 29 =
  32. 32.5 × 49 =
  33. 33.34 × 98 =
  34. 34.6 × 29 =
  35. 35.15 × 49 =
  36. 36.14 × 9 =
  37. 37.6 × 19 =
  38. 38.35 × 99 =
  39. 39.12 × 9 =
  40. 40.15 × 29 =

Answer key

  1. 54
  2. 686
  3. 1372
  4. 297
  5. 57
  6. 95
  7. 319
  8. 637
  9. 588
  10. 377
  11. 539
  12. 319
  13. 174
  14. 245
  15. 285
  16. 1176
  17. 490
  18. 3822
  19. 3626
  20. 294
  21. 117
  22. 245
  23. 588
  24. 2450
  25. 203
  26. 2842
  27. 1683
  28. 2058
  29. 2970
  30. 588
  31. 290
  32. 245
  33. 3332
  34. 174
  35. 735
  36. 126
  37. 114
  38. 3465
  39. 108
  40. 435

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