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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 841 · 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. 1.14 × 98 =
  2. 2.26 × 99 =
  3. 3.8 × 19 =
  4. 4.12 × 19 =
  5. 5.12 × 98 =
  6. 6.15 × 9 =
  7. 7.39 × 99 =
  8. 8.39 × 99 =
  9. 9.23 × 98 =
  10. 10.8 × 9 =
  11. 11.27 × 99 =
  12. 12.3 × 19 =
  13. 13.39 × 99 =
  14. 14.18 × 98 =
  15. 15.9 × 29 =
  16. 16.6 × 9 =
  17. 17.5 × 9 =
  18. 18.11 × 29 =
  19. 19.14 × 9 =
  20. 20.4 × 98 =
  21. 21.14 × 99 =
  22. 22.18 × 98 =
  23. 23.10 × 49 =
  24. 24.8 × 29 =
  25. 25.7 × 49 =
  26. 26.8 × 9 =
  27. 27.9 × 9 =
  28. 28.6 × 19 =
  29. 29.11 × 19 =
  30. 30.7 × 49 =
  31. 31.11 × 49 =
  32. 32.15 × 29 =
  33. 33.11 × 49 =
  34. 34.6 × 9 =
  35. 35.24 × 98 =
  36. 36.5 × 29 =
  37. 37.7 × 9 =
  38. 38.12 × 29 =
  39. 39.11 × 29 =
  40. 40.12 × 98 =

Answer key

  1. 1372
  2. 2574
  3. 152
  4. 228
  5. 1176
  6. 135
  7. 3861
  8. 3861
  9. 2254
  10. 72
  11. 2673
  12. 57
  13. 3861
  14. 1764
  15. 261
  16. 54
  17. 45
  18. 319
  19. 126
  20. 392
  21. 1386
  22. 1764
  23. 490
  24. 232
  25. 343
  26. 72
  27. 81
  28. 114
  29. 209
  30. 343
  31. 539
  32. 435
  33. 539
  34. 54
  35. 2352
  36. 145
  37. 63
  38. 348
  39. 319
  40. 1176

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