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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 587 · 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 × 49 =
  2. 2.4 × 19 =
  3. 3.13 × 9 =
  4. 4.9 × 19 =
  5. 5.35 × 99 =
  6. 6.4 × 19 =
  7. 7.6 × 19 =
  8. 8.7 × 98 =
  9. 9.14 × 29 =
  10. 10.6 × 29 =
  11. 11.16 × 99 =
  12. 12.12 × 19 =
  13. 13.15 × 49 =
  14. 14.22 × 98 =
  15. 15.6 × 49 =
  16. 16.34 × 99 =
  17. 17.37 × 98 =
  18. 18.14 × 9 =
  19. 19.6 × 99 =
  20. 20.40 × 98 =
  21. 21.3 × 99 =
  22. 22.10 × 19 =
  23. 23.9 × 49 =
  24. 24.4 × 9 =
  25. 25.7 × 19 =
  26. 26.12 × 29 =
  27. 27.14 × 29 =
  28. 28.8 × 98 =
  29. 29.12 × 9 =
  30. 30.12 × 99 =
  31. 31.19 × 99 =
  32. 32.12 × 99 =
  33. 33.6 × 99 =
  34. 34.4 × 19 =
  35. 35.27 × 98 =
  36. 36.3 × 19 =
  37. 37.4 × 9 =
  38. 38.7 × 29 =
  39. 39.11 × 49 =
  40. 40.13 × 98 =

Answer key

  1. 441
  2. 76
  3. 117
  4. 171
  5. 3465
  6. 76
  7. 114
  8. 686
  9. 406
  10. 174
  11. 1584
  12. 228
  13. 735
  14. 2156
  15. 294
  16. 3366
  17. 3626
  18. 126
  19. 594
  20. 3920
  21. 297
  22. 190
  23. 441
  24. 36
  25. 133
  26. 348
  27. 406
  28. 784
  29. 108
  30. 1188
  31. 1881
  32. 1188
  33. 594
  34. 76
  35. 2646
  36. 57
  37. 36
  38. 203
  39. 539
  40. 1274

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