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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 391 · 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. 1.6 × 19 =
  2. 2.6 × 29 =
  3. 3.7 × 49 =
  4. 4.12 × 19 =
  5. 5.5 × 9 =
  6. 6.3 × 19 =
  7. 7.29 × 98 =
  8. 8.7 × 9 =
  9. 9.12 × 9 =
  10. 10.10 × 19 =
  11. 11.10 × 29 =
  12. 12.13 × 49 =
  13. 13.11 × 99 =
  14. 14.5 × 29 =
  15. 15.12 × 19 =
  16. 16.13 × 49 =
  17. 17.8 × 19 =
  18. 18.3 × 19 =
  19. 19.17 × 98 =
  20. 20.14 × 9 =
  21. 21.7 × 29 =
  22. 22.15 × 29 =
  23. 23.9 × 9 =
  24. 24.39 × 99 =
  25. 25.11 × 49 =
  26. 26.7 × 29 =
  27. 27.14 × 9 =
  28. 28.8 × 19 =
  29. 29.14 × 49 =
  30. 30.7 × 98 =
  31. 31.6 × 98 =
  32. 32.14 × 49 =
  33. 33.10 × 19 =
  34. 34.13 × 9 =
  35. 35.8 × 9 =
  36. 36.5 × 9 =
  37. 37.13 × 9 =
  38. 38.3 × 19 =
  39. 39.13 × 49 =
  40. 40.8 × 49 =

Answer key

  1. 114
  2. 174
  3. 343
  4. 228
  5. 45
  6. 57
  7. 2842
  8. 63
  9. 108
  10. 190
  11. 290
  12. 637
  13. 1089
  14. 145
  15. 228
  16. 637
  17. 152
  18. 57
  19. 1666
  20. 126
  21. 203
  22. 435
  23. 81
  24. 3861
  25. 539
  26. 203
  27. 126
  28. 152
  29. 686
  30. 686
  31. 588
  32. 686
  33. 190
  34. 117
  35. 72
  36. 45
  37. 117
  38. 57
  39. 637
  40. 392

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