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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 364 · 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. 1.9 × 19 =
  2. 2.24 × 99 =
  3. 3.11 × 9 =
  4. 4.31 × 98 =
  5. 5.7 × 19 =
  6. 6.5 × 49 =
  7. 7.7 × 98 =
  8. 8.8 × 98 =
  9. 9.4 × 98 =
  10. 10.31 × 99 =
  11. 11.11 × 9 =
  12. 12.30 × 99 =
  13. 13.35 × 99 =
  14. 14.6 × 19 =
  15. 15.10 × 19 =
  16. 16.6 × 98 =
  17. 17.33 × 99 =
  18. 18.10 × 9 =
  19. 19.12 × 19 =
  20. 20.9 × 9 =
  21. 21.3 × 9 =
  22. 22.14 × 29 =
  23. 23.17 × 99 =
  24. 24.12 × 9 =
  25. 25.13 × 99 =
  26. 26.9 × 19 =
  27. 27.12 × 9 =
  28. 28.12 × 29 =
  29. 29.12 × 98 =
  30. 30.15 × 29 =
  31. 31.5 × 29 =
  32. 32.15 × 19 =
  33. 33.14 × 29 =
  34. 34.11 × 29 =
  35. 35.4 × 99 =
  36. 36.5 × 19 =
  37. 37.11 × 49 =
  38. 38.6 × 19 =
  39. 39.35 × 99 =
  40. 40.23 × 98 =

Answer key

  1. 171
  2. 2376
  3. 99
  4. 3038
  5. 133
  6. 245
  7. 686
  8. 784
  9. 392
  10. 3069
  11. 99
  12. 2970
  13. 3465
  14. 114
  15. 190
  16. 588
  17. 3267
  18. 90
  19. 228
  20. 81
  21. 27
  22. 406
  23. 1683
  24. 108
  25. 1287
  26. 171
  27. 108
  28. 348
  29. 1176
  30. 435
  31. 145
  32. 285
  33. 406
  34. 319
  35. 396
  36. 95
  37. 539
  38. 114
  39. 3465
  40. 2254

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