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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 279 · 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 × 29 =
  2. 2.5 × 9 =
  3. 3.8 × 19 =
  4. 4.12 × 99 =
  5. 5.8 × 19 =
  6. 6.11 × 29 =
  7. 7.11 × 29 =
  8. 8.14 × 29 =
  9. 9.6 × 19 =
  10. 10.10 × 99 =
  11. 11.13 × 29 =
  12. 12.14 × 98 =
  13. 13.13 × 99 =
  14. 14.35 × 98 =
  15. 15.11 × 19 =
  16. 16.15 × 29 =
  17. 17.12 × 29 =
  18. 18.13 × 19 =
  19. 19.8 × 29 =
  20. 20.5 × 19 =
  21. 21.18 × 99 =
  22. 22.10 × 49 =
  23. 23.39 × 99 =
  24. 24.31 × 99 =
  25. 25.15 × 19 =
  26. 26.9 × 9 =
  27. 27.11 × 29 =
  28. 28.6 × 9 =
  29. 29.10 × 19 =
  30. 30.7 × 9 =
  31. 31.6 × 49 =
  32. 32.8 × 19 =
  33. 33.29 × 99 =
  34. 34.9 × 98 =
  35. 35.4 × 49 =
  36. 36.15 × 9 =
  37. 37.8 × 19 =
  38. 38.3 × 9 =
  39. 39.5 × 19 =
  40. 40.11 × 19 =

Answer key

  1. 87
  2. 45
  3. 152
  4. 1188
  5. 152
  6. 319
  7. 319
  8. 406
  9. 114
  10. 990
  11. 377
  12. 1372
  13. 1287
  14. 3430
  15. 209
  16. 435
  17. 348
  18. 247
  19. 232
  20. 95
  21. 1782
  22. 490
  23. 3861
  24. 3069
  25. 285
  26. 81
  27. 319
  28. 54
  29. 190
  30. 63
  31. 294
  32. 152
  33. 2871
  34. 882
  35. 196
  36. 135
  37. 152
  38. 27
  39. 95
  40. 209

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