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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 486 · 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. 1.12 × 19 =
  2. 2.14 × 9 =
  3. 3.3 × 29 =
  4. 4.12 × 49 =
  5. 5.6 × 19 =
  6. 6.3 × 29 =
  7. 7.4 × 29 =
  8. 8.34 × 98 =
  9. 9.33 × 98 =
  10. 10.14 × 29 =
  11. 11.9 × 19 =
  12. 12.6 × 99 =
  13. 13.14 × 49 =
  14. 14.3 × 9 =
  15. 15.40 × 98 =
  16. 16.5 × 9 =
  17. 17.13 × 9 =
  18. 18.9 × 49 =
  19. 19.28 × 99 =
  20. 20.7 × 19 =
  21. 21.13 × 9 =
  22. 22.9 × 19 =
  23. 23.8 × 9 =
  24. 24.4 × 49 =
  25. 25.12 × 19 =
  26. 26.20 × 98 =
  27. 27.12 × 9 =
  28. 28.3 × 29 =
  29. 29.36 × 98 =
  30. 30.27 × 99 =
  31. 31.11 × 99 =
  32. 32.8 × 9 =
  33. 33.20 × 98 =
  34. 34.4 × 29 =
  35. 35.25 × 99 =
  36. 36.15 × 49 =
  37. 37.5 × 19 =
  38. 38.10 × 19 =
  39. 39.13 × 9 =
  40. 40.36 × 99 =

Answer key

  1. 228
  2. 126
  3. 87
  4. 588
  5. 114
  6. 87
  7. 116
  8. 3332
  9. 3234
  10. 406
  11. 171
  12. 594
  13. 686
  14. 27
  15. 3920
  16. 45
  17. 117
  18. 441
  19. 2772
  20. 133
  21. 117
  22. 171
  23. 72
  24. 196
  25. 228
  26. 1960
  27. 108
  28. 87
  29. 3528
  30. 2673
  31. 1089
  32. 72
  33. 1960
  34. 116
  35. 2475
  36. 735
  37. 95
  38. 190
  39. 117
  40. 3564

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