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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 215 · 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. 2.9 × 19 =
  3. 3.4 × 9 =
  4. 4.11 × 49 =
  5. 5.7 × 9 =
  6. 6.11 × 19 =
  7. 7.3 × 99 =
  8. 8.13 × 19 =
  9. 9.10 × 49 =
  10. 10.6 × 19 =
  11. 11.10 × 29 =
  12. 12.7 × 49 =
  13. 13.6 × 19 =
  14. 14.7 × 9 =
  15. 15.3 × 19 =
  16. 16.11 × 29 =
  17. 17.5 × 19 =
  18. 18.4 × 29 =
  19. 19.9 × 19 =
  20. 20.38 × 99 =
  21. 21.4 × 19 =
  22. 22.4 × 99 =
  23. 23.15 × 49 =
  24. 24.8 × 19 =
  25. 25.4 × 19 =
  26. 26.14 × 9 =
  27. 27.15 × 19 =
  28. 28.3 × 98 =
  29. 29.22 × 99 =
  30. 30.4 × 9 =
  31. 31.37 × 98 =
  32. 32.12 × 9 =
  33. 33.15 × 49 =
  34. 34.3 × 19 =
  35. 35.31 × 99 =
  36. 36.15 × 19 =
  37. 37.40 × 98 =
  38. 38.4 × 19 =
  39. 39.6 × 19 =
  40. 40.17 × 99 =

Answer key

  1. 87
  2. 171
  3. 36
  4. 539
  5. 63
  6. 209
  7. 297
  8. 247
  9. 490
  10. 114
  11. 290
  12. 343
  13. 114
  14. 63
  15. 57
  16. 319
  17. 95
  18. 116
  19. 171
  20. 3762
  21. 76
  22. 396
  23. 735
  24. 152
  25. 76
  26. 126
  27. 285
  28. 294
  29. 2178
  30. 36
  31. 3626
  32. 108
  33. 735
  34. 57
  35. 3069
  36. 285
  37. 3920
  38. 76
  39. 114
  40. 1683

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