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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 90 · 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. 1.3 × 29 =
  2. 2.11 × 19 =
  3. 3.19 × 99 =
  4. 4.5 × 9 =
  5. 5.4 × 29 =
  6. 6.7 × 19 =
  7. 7.15 × 29 =
  8. 8.3 × 19 =
  9. 9.10 × 49 =
  10. 10.19 × 98 =
  11. 11.3 × 9 =
  12. 12.12 × 98 =
  13. 13.12 × 19 =
  14. 14.12 × 29 =
  15. 15.14 × 9 =
  16. 16.24 × 98 =
  17. 17.3 × 49 =
  18. 18.4 × 49 =
  19. 19.13 × 9 =
  20. 20.8 × 9 =
  21. 21.6 × 49 =
  22. 22.4 × 9 =
  23. 23.4 × 19 =
  24. 24.8 × 9 =
  25. 25.39 × 98 =
  26. 26.7 × 19 =
  27. 27.14 × 99 =
  28. 28.10 × 19 =
  29. 29.32 × 99 =
  30. 30.29 × 99 =
  31. 31.4 × 29 =
  32. 32.13 × 9 =
  33. 33.21 × 98 =
  34. 34.9 × 9 =
  35. 35.9 × 19 =
  36. 36.10 × 19 =
  37. 37.4 × 98 =
  38. 38.6 × 98 =
  39. 39.15 × 49 =
  40. 40.32 × 99 =

Answer key

  1. 87
  2. 209
  3. 1881
  4. 45
  5. 116
  6. 133
  7. 435
  8. 57
  9. 490
  10. 1862
  11. 27
  12. 1176
  13. 228
  14. 348
  15. 126
  16. 2352
  17. 147
  18. 196
  19. 117
  20. 72
  21. 294
  22. 36
  23. 76
  24. 72
  25. 3822
  26. 133
  27. 1386
  28. 190
  29. 3168
  30. 2871
  31. 116
  32. 117
  33. 2058
  34. 81
  35. 171
  36. 190
  37. 392
  38. 588
  39. 735
  40. 3168

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