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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 779 · 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. 1.20 × 99 =
  2. 2.4 × 19 =
  3. 3.11 × 99 =
  4. 4.9 × 29 =
  5. 5.10 × 19 =
  6. 6.28 × 98 =
  7. 7.8 × 9 =
  8. 8.40 × 98 =
  9. 9.8 × 9 =
  10. 10.3 × 29 =
  11. 11.23 × 99 =
  12. 12.27 × 98 =
  13. 13.25 × 98 =
  14. 14.7 × 19 =
  15. 15.6 × 9 =
  16. 16.8 × 9 =
  17. 17.3 × 49 =
  18. 18.3 × 99 =
  19. 19.6 × 9 =
  20. 20.8 × 29 =
  21. 21.12 × 19 =
  22. 22.12 × 9 =
  23. 23.8 × 98 =
  24. 24.29 × 98 =
  25. 25.5 × 9 =
  26. 26.17 × 98 =
  27. 27.12 × 98 =
  28. 28.6 × 19 =
  29. 29.31 × 99 =
  30. 30.15 × 9 =
  31. 31.3 × 29 =
  32. 32.39 × 98 =
  33. 33.10 × 49 =
  34. 34.6 × 29 =
  35. 35.17 × 99 =
  36. 36.18 × 98 =
  37. 37.13 × 9 =
  38. 38.15 × 19 =
  39. 39.15 × 49 =
  40. 40.22 × 98 =

Answer key

  1. 1980
  2. 76
  3. 1089
  4. 261
  5. 190
  6. 2744
  7. 72
  8. 3920
  9. 72
  10. 87
  11. 2277
  12. 2646
  13. 2450
  14. 133
  15. 54
  16. 72
  17. 147
  18. 297
  19. 54
  20. 232
  21. 228
  22. 108
  23. 784
  24. 2842
  25. 45
  26. 1666
  27. 1176
  28. 114
  29. 3069
  30. 135
  31. 87
  32. 3822
  33. 490
  34. 174
  35. 1683
  36. 1764
  37. 117
  38. 285
  39. 735
  40. 2156

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