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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 169 · 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 × 98 =
  2. 2.24 × 99 =
  3. 3.6 × 9 =
  4. 4.4 × 29 =
  5. 5.23 × 98 =
  6. 6.9 × 99 =
  7. 7.10 × 9 =
  8. 8.7 × 49 =
  9. 9.6 × 29 =
  10. 10.11 × 49 =
  11. 11.13 × 9 =
  12. 12.9 × 19 =
  13. 13.9 × 9 =
  14. 14.5 × 49 =
  15. 15.31 × 99 =
  16. 16.9 × 49 =
  17. 17.31 × 98 =
  18. 18.6 × 19 =
  19. 19.5 × 98 =
  20. 20.6 × 29 =
  21. 21.7 × 29 =
  22. 22.12 × 98 =
  23. 23.10 × 9 =
  24. 24.20 × 98 =
  25. 25.21 × 98 =
  26. 26.12 × 98 =
  27. 27.6 × 9 =
  28. 28.8 × 19 =
  29. 29.23 × 98 =
  30. 30.6 × 98 =
  31. 31.10 × 19 =
  32. 32.35 × 99 =
  33. 33.10 × 19 =
  34. 34.18 × 99 =
  35. 35.6 × 49 =
  36. 36.11 × 49 =
  37. 37.9 × 19 =
  38. 38.3 × 49 =
  39. 39.9 × 49 =
  40. 40.30 × 99 =

Answer key

  1. 588
  2. 2376
  3. 54
  4. 116
  5. 2254
  6. 891
  7. 90
  8. 343
  9. 174
  10. 539
  11. 117
  12. 171
  13. 81
  14. 245
  15. 3069
  16. 441
  17. 3038
  18. 114
  19. 490
  20. 174
  21. 203
  22. 1176
  23. 90
  24. 1960
  25. 2058
  26. 1176
  27. 54
  28. 152
  29. 2254
  30. 588
  31. 190
  32. 3465
  33. 190
  34. 1782
  35. 294
  36. 539
  37. 171
  38. 147
  39. 441
  40. 2970

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