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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 519 · 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. 1.5 × 49 =
  2. 2.35 × 99 =
  3. 3.13 × 9 =
  4. 4.24 × 98 =
  5. 5.13 × 29 =
  6. 6.12 × 49 =
  7. 7.3 × 19 =
  8. 8.4 × 9 =
  9. 9.12 × 29 =
  10. 10.9 × 29 =
  11. 11.10 × 19 =
  12. 12.7 × 9 =
  13. 13.10 × 29 =
  14. 14.29 × 99 =
  15. 15.9 × 98 =
  16. 16.19 × 99 =
  17. 17.7 × 19 =
  18. 18.5 × 29 =
  19. 19.11 × 29 =
  20. 20.12 × 29 =
  21. 21.3 × 9 =
  22. 22.6 × 98 =
  23. 23.10 × 49 =
  24. 24.21 × 98 =
  25. 25.13 × 49 =
  26. 26.23 × 99 =
  27. 27.8 × 19 =
  28. 28.24 × 98 =
  29. 29.4 × 19 =
  30. 30.4 × 49 =
  31. 31.9 × 29 =
  32. 32.12 × 49 =
  33. 33.6 × 29 =
  34. 34.4 × 19 =
  35. 35.13 × 49 =
  36. 36.21 × 99 =
  37. 37.9 × 19 =
  38. 38.9 × 19 =
  39. 39.15 × 19 =
  40. 40.6 × 29 =

Answer key

  1. 245
  2. 3465
  3. 117
  4. 2352
  5. 377
  6. 588
  7. 57
  8. 36
  9. 348
  10. 261
  11. 190
  12. 63
  13. 290
  14. 2871
  15. 882
  16. 1881
  17. 133
  18. 145
  19. 319
  20. 348
  21. 27
  22. 588
  23. 490
  24. 2058
  25. 637
  26. 2277
  27. 152
  28. 2352
  29. 76
  30. 196
  31. 261
  32. 588
  33. 174
  34. 76
  35. 637
  36. 2079
  37. 171
  38. 171
  39. 285
  40. 174

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