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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 345 · 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. 1.33 × 98 =
  2. 2.10 × 9 =
  3. 3.3 × 49 =
  4. 4.13 × 19 =
  5. 5.3 × 19 =
  6. 6.7 × 19 =
  7. 7.6 × 19 =
  8. 8.5 × 9 =
  9. 9.12 × 19 =
  10. 10.5 × 9 =
  11. 11.15 × 98 =
  12. 12.29 × 99 =
  13. 13.5 × 29 =
  14. 14.8 × 9 =
  15. 15.9 × 29 =
  16. 16.11 × 9 =
  17. 17.34 × 98 =
  18. 18.5 × 19 =
  19. 19.12 × 29 =
  20. 20.5 × 19 =
  21. 21.13 × 9 =
  22. 22.11 × 29 =
  23. 23.18 × 99 =
  24. 24.23 × 98 =
  25. 25.5 × 19 =
  26. 26.21 × 99 =
  27. 27.14 × 49 =
  28. 28.3 × 9 =
  29. 29.4 × 29 =
  30. 30.6 × 49 =
  31. 31.39 × 98 =
  32. 32.31 × 98 =
  33. 33.7 × 9 =
  34. 34.11 × 9 =
  35. 35.7 × 19 =
  36. 36.6 × 98 =
  37. 37.28 × 99 =
  38. 38.10 × 19 =
  39. 39.7 × 98 =
  40. 40.18 × 99 =

Answer key

  1. 3234
  2. 90
  3. 147
  4. 247
  5. 57
  6. 133
  7. 114
  8. 45
  9. 228
  10. 45
  11. 1470
  12. 2871
  13. 145
  14. 72
  15. 261
  16. 99
  17. 3332
  18. 95
  19. 348
  20. 95
  21. 117
  22. 319
  23. 1782
  24. 2254
  25. 95
  26. 2079
  27. 686
  28. 27
  29. 116
  30. 294
  31. 3822
  32. 3038
  33. 63
  34. 99
  35. 133
  36. 588
  37. 2772
  38. 190
  39. 686
  40. 1782

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