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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 493 · 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 × 9 =
  2. 2.4 × 29 =
  3. 3.14 × 19 =
  4. 4.5 × 49 =
  5. 5.6 × 9 =
  6. 6.11 × 19 =
  7. 7.5 × 19 =
  8. 8.9 × 19 =
  9. 9.7 × 29 =
  10. 10.7 × 9 =
  11. 11.37 × 99 =
  12. 12.5 × 49 =
  13. 13.14 × 19 =
  14. 14.5 × 29 =
  15. 15.22 × 99 =
  16. 16.15 × 29 =
  17. 17.10 × 19 =
  18. 18.23 × 98 =
  19. 19.7 × 49 =
  20. 20.8 × 29 =
  21. 21.15 × 19 =
  22. 22.4 × 9 =
  23. 23.8 × 99 =
  24. 24.16 × 99 =
  25. 25.3 × 29 =
  26. 26.30 × 99 =
  27. 27.34 × 99 =
  28. 28.12 × 19 =
  29. 29.12 × 29 =
  30. 30.6 × 49 =
  31. 31.5 × 29 =
  32. 32.5 × 19 =
  33. 33.3 × 9 =
  34. 34.12 × 9 =
  35. 35.8 × 49 =
  36. 36.7 × 19 =
  37. 37.18 × 98 =
  38. 38.8 × 49 =
  39. 39.10 × 19 =
  40. 40.8 × 19 =

Answer key

  1. 81
  2. 116
  3. 266
  4. 245
  5. 54
  6. 209
  7. 95
  8. 171
  9. 203
  10. 63
  11. 3663
  12. 245
  13. 266
  14. 145
  15. 2178
  16. 435
  17. 190
  18. 2254
  19. 343
  20. 232
  21. 285
  22. 36
  23. 792
  24. 1584
  25. 87
  26. 2970
  27. 3366
  28. 228
  29. 348
  30. 294
  31. 145
  32. 95
  33. 27
  34. 108
  35. 392
  36. 133
  37. 1764
  38. 392
  39. 190
  40. 152

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