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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 684 · 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. 1.23 × 98 =
  2. 2.10 × 19 =
  3. 3.3 × 98 =
  4. 4.5 × 29 =
  5. 5.11 × 98 =
  6. 6.12 × 19 =
  7. 7.39 × 99 =
  8. 8.3 × 29 =
  9. 9.8 × 9 =
  10. 10.16 × 99 =
  11. 11.8 × 9 =
  12. 12.14 × 9 =
  13. 13.12 × 49 =
  14. 14.5 × 29 =
  15. 15.13 × 9 =
  16. 16.4 × 19 =
  17. 17.6 × 9 =
  18. 18.9 × 19 =
  19. 19.11 × 9 =
  20. 20.10 × 19 =
  21. 21.12 × 49 =
  22. 22.25 × 98 =
  23. 23.6 × 98 =
  24. 24.20 × 98 =
  25. 25.13 × 29 =
  26. 26.7 × 29 =
  27. 27.9 × 49 =
  28. 28.14 × 49 =
  29. 29.32 × 99 =
  30. 30.12 × 29 =
  31. 31.10 × 19 =
  32. 32.13 × 19 =
  33. 33.8 × 19 =
  34. 34.7 × 29 =
  35. 35.15 × 98 =
  36. 36.8 × 49 =
  37. 37.35 × 98 =
  38. 38.5 × 29 =
  39. 39.11 × 99 =
  40. 40.14 × 9 =

Answer key

  1. 2254
  2. 190
  3. 294
  4. 145
  5. 1078
  6. 228
  7. 3861
  8. 87
  9. 72
  10. 1584
  11. 72
  12. 126
  13. 588
  14. 145
  15. 117
  16. 76
  17. 54
  18. 171
  19. 99
  20. 190
  21. 588
  22. 2450
  23. 588
  24. 1960
  25. 377
  26. 203
  27. 441
  28. 686
  29. 3168
  30. 348
  31. 190
  32. 247
  33. 152
  34. 203
  35. 1470
  36. 392
  37. 3430
  38. 145
  39. 1089
  40. 126

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