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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 106 · 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. 1.3 × 49 =
  2. 2.11 × 19 =
  3. 3.5 × 49 =
  4. 4.22 × 98 =
  5. 5.10 × 19 =
  6. 6.18 × 99 =
  7. 7.14 × 98 =
  8. 8.3 × 9 =
  9. 9.14 × 9 =
  10. 10.5 × 49 =
  11. 11.22 × 98 =
  12. 12.11 × 19 =
  13. 13.12 × 29 =
  14. 14.6 × 19 =
  15. 15.31 × 98 =
  16. 16.12 × 98 =
  17. 17.4 × 29 =
  18. 18.3 × 98 =
  19. 19.22 × 99 =
  20. 20.13 × 98 =
  21. 21.14 × 49 =
  22. 22.6 × 49 =
  23. 23.4 × 29 =
  24. 24.9 × 19 =
  25. 25.7 × 9 =
  26. 26.14 × 49 =
  27. 27.8 × 99 =
  28. 28.38 × 99 =
  29. 29.8 × 9 =
  30. 30.4 × 9 =
  31. 31.35 × 99 =
  32. 32.5 × 19 =
  33. 33.6 × 49 =
  34. 34.11 × 19 =
  35. 35.15 × 9 =
  36. 36.21 × 98 =
  37. 37.3 × 19 =
  38. 38.8 × 9 =
  39. 39.5 × 9 =
  40. 40.35 × 98 =

Answer key

  1. 147
  2. 209
  3. 245
  4. 2156
  5. 190
  6. 1782
  7. 1372
  8. 27
  9. 126
  10. 245
  11. 2156
  12. 209
  13. 348
  14. 114
  15. 3038
  16. 1176
  17. 116
  18. 294
  19. 2178
  20. 1274
  21. 686
  22. 294
  23. 116
  24. 171
  25. 63
  26. 686
  27. 792
  28. 3762
  29. 72
  30. 36
  31. 3465
  32. 95
  33. 294
  34. 209
  35. 135
  36. 2058
  37. 57
  38. 72
  39. 45
  40. 3430

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