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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 828 · 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. 1.10 × 9 =
  2. 2.14 × 9 =
  3. 3.3 × 19 =
  4. 4.6 × 9 =
  5. 5.4 × 29 =
  6. 6.11 × 29 =
  7. 7.3 × 29 =
  8. 8.32 × 98 =
  9. 9.5 × 9 =
  10. 10.3 × 98 =
  11. 11.14 × 29 =
  12. 12.8 × 98 =
  13. 13.10 × 19 =
  14. 14.5 × 29 =
  15. 15.5 × 19 =
  16. 16.11 × 9 =
  17. 17.15 × 19 =
  18. 18.9 × 29 =
  19. 19.5 × 49 =
  20. 20.15 × 19 =
  21. 21.40 × 98 =
  22. 22.40 × 98 =
  23. 23.4 × 19 =
  24. 24.5 × 19 =
  25. 25.6 × 19 =
  26. 26.8 × 9 =
  27. 27.4 × 9 =
  28. 28.8 × 49 =
  29. 29.18 × 98 =
  30. 30.6 × 19 =
  31. 31.12 × 19 =
  32. 32.11 × 19 =
  33. 33.6 × 99 =
  34. 34.8 × 29 =
  35. 35.6 × 29 =
  36. 36.7 × 98 =
  37. 37.27 × 99 =
  38. 38.10 × 9 =
  39. 39.6 × 29 =
  40. 40.8 × 98 =

Answer key

  1. 90
  2. 126
  3. 57
  4. 54
  5. 116
  6. 319
  7. 87
  8. 3136
  9. 45
  10. 294
  11. 406
  12. 784
  13. 190
  14. 145
  15. 95
  16. 99
  17. 285
  18. 261
  19. 245
  20. 285
  21. 3920
  22. 3920
  23. 76
  24. 95
  25. 114
  26. 72
  27. 36
  28. 392
  29. 1764
  30. 114
  31. 228
  32. 209
  33. 594
  34. 232
  35. 174
  36. 686
  37. 2673
  38. 90
  39. 174
  40. 784

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