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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 516 · 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. 1.32 × 98 =
  2. 2.3 × 29 =
  3. 3.13 × 19 =
  4. 4.17 × 99 =
  5. 5.33 × 99 =
  6. 6.4 × 9 =
  7. 7.3 × 49 =
  8. 8.5 × 19 =
  9. 9.10 × 19 =
  10. 10.7 × 19 =
  11. 11.6 × 29 =
  12. 12.29 × 98 =
  13. 13.14 × 29 =
  14. 14.6 × 9 =
  15. 15.13 × 49 =
  16. 16.6 × 9 =
  17. 17.14 × 49 =
  18. 18.9 × 9 =
  19. 19.15 × 9 =
  20. 20.8 × 9 =
  21. 21.7 × 19 =
  22. 22.19 × 98 =
  23. 23.10 × 9 =
  24. 24.15 × 19 =
  25. 25.8 × 9 =
  26. 26.28 × 98 =
  27. 27.9 × 29 =
  28. 28.9 × 9 =
  29. 29.13 × 9 =
  30. 30.23 × 99 =
  31. 31.27 × 99 =
  32. 32.12 × 49 =
  33. 33.10 × 98 =
  34. 34.14 × 9 =
  35. 35.11 × 29 =
  36. 36.6 × 49 =
  37. 37.19 × 98 =
  38. 38.12 × 19 =
  39. 39.14 × 49 =
  40. 40.15 × 19 =

Answer key

  1. 3136
  2. 87
  3. 247
  4. 1683
  5. 3267
  6. 36
  7. 147
  8. 95
  9. 190
  10. 133
  11. 174
  12. 2842
  13. 406
  14. 54
  15. 637
  16. 54
  17. 686
  18. 81
  19. 135
  20. 72
  21. 133
  22. 1862
  23. 90
  24. 285
  25. 72
  26. 2744
  27. 261
  28. 81
  29. 117
  30. 2277
  31. 2673
  32. 588
  33. 980
  34. 126
  35. 319
  36. 294
  37. 1862
  38. 228
  39. 686
  40. 285

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