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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 172 · 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. 1.29 × 99 =
  2. 2.13 × 29 =
  3. 3.6 × 19 =
  4. 4.11 × 19 =
  5. 5.7 × 19 =
  6. 6.7 × 49 =
  7. 7.3 × 9 =
  8. 8.12 × 9 =
  9. 9.11 × 98 =
  10. 10.13 × 98 =
  11. 11.4 × 9 =
  12. 12.6 × 49 =
  13. 13.14 × 99 =
  14. 14.11 × 49 =
  15. 15.39 × 99 =
  16. 16.5 × 9 =
  17. 17.11 × 49 =
  18. 18.3 × 19 =
  19. 19.11 × 99 =
  20. 20.3 × 98 =
  21. 21.5 × 49 =
  22. 22.9 × 98 =
  23. 23.14 × 19 =
  24. 24.15 × 49 =
  25. 25.40 × 99 =
  26. 26.34 × 98 =
  27. 27.3 × 49 =
  28. 28.5 × 9 =
  29. 29.11 × 49 =
  30. 30.4 × 19 =
  31. 31.15 × 49 =
  32. 32.5 × 9 =
  33. 33.12 × 19 =
  34. 34.15 × 99 =
  35. 35.11 × 29 =
  36. 36.6 × 99 =
  37. 37.31 × 99 =
  38. 38.4 × 19 =
  39. 39.13 × 98 =
  40. 40.30 × 98 =

Answer key

  1. 2871
  2. 377
  3. 114
  4. 209
  5. 133
  6. 343
  7. 27
  8. 108
  9. 1078
  10. 1274
  11. 36
  12. 294
  13. 1386
  14. 539
  15. 3861
  16. 45
  17. 539
  18. 57
  19. 1089
  20. 294
  21. 245
  22. 882
  23. 266
  24. 735
  25. 3960
  26. 3332
  27. 147
  28. 45
  29. 539
  30. 76
  31. 735
  32. 45
  33. 228
  34. 1485
  35. 319
  36. 594
  37. 3069
  38. 76
  39. 1274
  40. 2940

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