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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 438 · 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. 1.15 × 19 =
  2. 2.10 × 49 =
  3. 3.9 × 98 =
  4. 4.13 × 49 =
  5. 5.6 × 19 =
  6. 6.3 × 19 =
  7. 7.8 × 19 =
  8. 8.22 × 98 =
  9. 9.39 × 98 =
  10. 10.19 × 99 =
  11. 11.5 × 49 =
  12. 12.3 × 29 =
  13. 13.4 × 19 =
  14. 14.18 × 98 =
  15. 15.34 × 98 =
  16. 16.22 × 99 =
  17. 17.13 × 29 =
  18. 18.4 × 29 =
  19. 19.6 × 9 =
  20. 20.3 × 49 =
  21. 21.9 × 19 =
  22. 22.8 × 98 =
  23. 23.13 × 9 =
  24. 24.10 × 49 =
  25. 25.13 × 19 =
  26. 26.14 × 49 =
  27. 27.11 × 29 =
  28. 28.14 × 99 =
  29. 29.9 × 49 =
  30. 30.9 × 29 =
  31. 31.5 × 29 =
  32. 32.6 × 9 =
  33. 33.13 × 19 =
  34. 34.14 × 99 =
  35. 35.5 × 29 =
  36. 36.14 × 29 =
  37. 37.19 × 99 =
  38. 38.12 × 19 =
  39. 39.12 × 9 =
  40. 40.12 × 99 =

Answer key

  1. 285
  2. 490
  3. 882
  4. 637
  5. 114
  6. 57
  7. 152
  8. 2156
  9. 3822
  10. 1881
  11. 245
  12. 87
  13. 76
  14. 1764
  15. 3332
  16. 2178
  17. 377
  18. 116
  19. 54
  20. 147
  21. 171
  22. 784
  23. 117
  24. 490
  25. 247
  26. 686
  27. 319
  28. 1386
  29. 441
  30. 261
  31. 145
  32. 54
  33. 247
  34. 1386
  35. 145
  36. 406
  37. 1881
  38. 228
  39. 108
  40. 1188

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