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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 396 · 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 × 9 =
  2. 2.8 × 98 =
  3. 3.3 × 9 =
  4. 4.12 × 19 =
  5. 5.10 × 9 =
  6. 6.15 × 9 =
  7. 7.11 × 19 =
  8. 8.7 × 19 =
  9. 9.3 × 19 =
  10. 10.3 × 29 =
  11. 11.7 × 49 =
  12. 12.13 × 49 =
  13. 13.4 × 9 =
  14. 14.5 × 9 =
  15. 15.18 × 99 =
  16. 16.7 × 29 =
  17. 17.6 × 29 =
  18. 18.9 × 49 =
  19. 19.19 × 98 =
  20. 20.12 × 49 =
  21. 21.8 × 19 =
  22. 22.14 × 19 =
  23. 23.4 × 9 =
  24. 24.6 × 29 =
  25. 25.5 × 49 =
  26. 26.29 × 98 =
  27. 27.9 × 19 =
  28. 28.6 × 49 =
  29. 29.3 × 19 =
  30. 30.15 × 29 =
  31. 31.33 × 98 =
  32. 32.15 × 49 =
  33. 33.12 × 29 =
  34. 34.13 × 98 =
  35. 35.34 × 98 =
  36. 36.10 × 9 =
  37. 37.4 × 19 =
  38. 38.3 × 98 =
  39. 39.13 × 9 =
  40. 40.3 × 49 =

Answer key

  1. 27
  2. 784
  3. 27
  4. 228
  5. 90
  6. 135
  7. 209
  8. 133
  9. 57
  10. 87
  11. 343
  12. 637
  13. 36
  14. 45
  15. 1782
  16. 203
  17. 174
  18. 441
  19. 1862
  20. 588
  21. 152
  22. 266
  23. 36
  24. 174
  25. 245
  26. 2842
  27. 171
  28. 294
  29. 57
  30. 435
  31. 3234
  32. 735
  33. 348
  34. 1274
  35. 3332
  36. 90
  37. 76
  38. 294
  39. 117
  40. 147

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