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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 165 · 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. 1.33 × 98 =
  2. 2.15 × 19 =
  3. 3.8 × 49 =
  4. 4.10 × 9 =
  5. 5.10 × 19 =
  6. 6.7 × 98 =
  7. 7.10 × 19 =
  8. 8.24 × 99 =
  9. 9.13 × 29 =
  10. 10.16 × 99 =
  11. 11.35 × 98 =
  12. 12.8 × 19 =
  13. 13.13 × 49 =
  14. 14.5 × 49 =
  15. 15.33 × 98 =
  16. 16.6 × 49 =
  17. 17.5 × 98 =
  18. 18.7 × 9 =
  19. 19.14 × 49 =
  20. 20.13 × 9 =
  21. 21.3 × 98 =
  22. 22.4 × 9 =
  23. 23.11 × 49 =
  24. 24.8 × 9 =
  25. 25.7 × 98 =
  26. 26.9 × 99 =
  27. 27.12 × 9 =
  28. 28.11 × 9 =
  29. 29.8 × 49 =
  30. 30.19 × 99 =
  31. 31.11 × 19 =
  32. 32.31 × 98 =
  33. 33.4 × 49 =
  34. 34.19 × 99 =
  35. 35.9 × 9 =
  36. 36.5 × 49 =
  37. 37.29 × 98 =
  38. 38.12 × 29 =
  39. 39.13 × 19 =
  40. 40.4 × 49 =

Answer key

  1. 3234
  2. 285
  3. 392
  4. 90
  5. 190
  6. 686
  7. 190
  8. 2376
  9. 377
  10. 1584
  11. 3430
  12. 152
  13. 637
  14. 245
  15. 3234
  16. 294
  17. 490
  18. 63
  19. 686
  20. 117
  21. 294
  22. 36
  23. 539
  24. 72
  25. 686
  26. 891
  27. 108
  28. 99
  29. 392
  30. 1881
  31. 209
  32. 3038
  33. 196
  34. 1881
  35. 81
  36. 245
  37. 2842
  38. 348
  39. 247
  40. 196

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