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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 645 · 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. 1.24 × 98 =
  2. 2.26 × 99 =
  3. 3.38 × 99 =
  4. 4.5 × 29 =
  5. 5.5 × 9 =
  6. 6.11 × 9 =
  7. 7.9 × 49 =
  8. 8.7 × 19 =
  9. 9.5 × 98 =
  10. 10.35 × 98 =
  11. 11.4 × 9 =
  12. 12.25 × 98 =
  13. 13.10 × 29 =
  14. 14.5 × 19 =
  15. 15.12 × 19 =
  16. 16.20 × 99 =
  17. 17.3 × 9 =
  18. 18.13 × 29 =
  19. 19.6 × 49 =
  20. 20.13 × 98 =
  21. 21.37 × 99 =
  22. 22.8 × 29 =
  23. 23.6 × 49 =
  24. 24.35 × 98 =
  25. 25.5 × 29 =
  26. 26.12 × 9 =
  27. 27.8 × 49 =
  28. 28.10 × 49 =
  29. 29.10 × 98 =
  30. 30.12 × 29 =
  31. 31.12 × 49 =
  32. 32.4 × 9 =
  33. 33.15 × 49 =
  34. 34.3 × 19 =
  35. 35.3 × 29 =
  36. 36.31 × 98 =
  37. 37.3 × 49 =
  38. 38.11 × 19 =
  39. 39.11 × 9 =
  40. 40.30 × 98 =

Answer key

  1. 2352
  2. 2574
  3. 3762
  4. 145
  5. 45
  6. 99
  7. 441
  8. 133
  9. 490
  10. 3430
  11. 36
  12. 2450
  13. 290
  14. 95
  15. 228
  16. 1980
  17. 27
  18. 377
  19. 294
  20. 1274
  21. 3663
  22. 232
  23. 294
  24. 3430
  25. 145
  26. 108
  27. 392
  28. 490
  29. 980
  30. 348
  31. 588
  32. 36
  33. 735
  34. 57
  35. 87
  36. 3038
  37. 147
  38. 209
  39. 99
  40. 2940

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