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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 239 · 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. 1.8 × 19 =
  2. 2.31 × 98 =
  3. 3.26 × 98 =
  4. 4.15 × 9 =
  5. 5.4 × 49 =
  6. 6.5 × 99 =
  7. 7.5 × 49 =
  8. 8.8 × 29 =
  9. 9.3 × 29 =
  10. 10.7 × 49 =
  11. 11.19 × 98 =
  12. 12.15 × 99 =
  13. 13.8 × 19 =
  14. 14.6 × 29 =
  15. 15.6 × 98 =
  16. 16.11 × 49 =
  17. 17.3 × 49 =
  18. 18.3 × 49 =
  19. 19.23 × 99 =
  20. 20.12 × 49 =
  21. 21.26 × 98 =
  22. 22.25 × 98 =
  23. 23.8 × 98 =
  24. 24.10 × 9 =
  25. 25.8 × 99 =
  26. 26.24 × 98 =
  27. 27.35 × 98 =
  28. 28.6 × 49 =
  29. 29.21 × 98 =
  30. 30.14 × 9 =
  31. 31.8 × 9 =
  32. 32.9 × 9 =
  33. 33.12 × 29 =
  34. 34.9 × 49 =
  35. 35.18 × 98 =
  36. 36.11 × 9 =
  37. 37.7 × 29 =
  38. 38.15 × 49 =
  39. 39.16 × 98 =
  40. 40.14 × 19 =

Answer key

  1. 152
  2. 3038
  3. 2548
  4. 135
  5. 196
  6. 495
  7. 245
  8. 232
  9. 87
  10. 343
  11. 1862
  12. 1485
  13. 152
  14. 174
  15. 588
  16. 539
  17. 147
  18. 147
  19. 2277
  20. 588
  21. 2548
  22. 2450
  23. 784
  24. 90
  25. 792
  26. 2352
  27. 3430
  28. 294
  29. 2058
  30. 126
  31. 72
  32. 81
  33. 348
  34. 441
  35. 1764
  36. 99
  37. 203
  38. 735
  39. 1568
  40. 266

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