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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 151 · 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. 1.4 × 9 =
  2. 2.5 × 99 =
  3. 3.5 × 29 =
  4. 4.8 × 49 =
  5. 5.4 × 19 =
  6. 6.24 × 98 =
  7. 7.4 × 19 =
  8. 8.10 × 9 =
  9. 9.5 × 29 =
  10. 10.11 × 29 =
  11. 11.11 × 49 =
  12. 12.4 × 98 =
  13. 13.9 × 29 =
  14. 14.13 × 49 =
  15. 15.3 × 19 =
  16. 16.10 × 99 =
  17. 17.14 × 29 =
  18. 18.4 × 49 =
  19. 19.24 × 99 =
  20. 20.15 × 29 =
  21. 21.7 × 29 =
  22. 22.10 × 98 =
  23. 23.8 × 29 =
  24. 24.15 × 98 =
  25. 25.13 × 9 =
  26. 26.5 × 29 =
  27. 27.27 × 98 =
  28. 28.12 × 29 =
  29. 29.13 × 29 =
  30. 30.33 × 98 =
  31. 31.12 × 19 =
  32. 32.3 × 29 =
  33. 33.11 × 9 =
  34. 34.5 × 49 =
  35. 35.3 × 9 =
  36. 36.4 × 49 =
  37. 37.13 × 49 =
  38. 38.15 × 29 =
  39. 39.13 × 99 =
  40. 40.23 × 99 =

Answer key

  1. 36
  2. 495
  3. 145
  4. 392
  5. 76
  6. 2352
  7. 76
  8. 90
  9. 145
  10. 319
  11. 539
  12. 392
  13. 261
  14. 637
  15. 57
  16. 990
  17. 406
  18. 196
  19. 2376
  20. 435
  21. 203
  22. 980
  23. 232
  24. 1470
  25. 117
  26. 145
  27. 2646
  28. 348
  29. 377
  30. 3234
  31. 228
  32. 87
  33. 99
  34. 245
  35. 27
  36. 196
  37. 637
  38. 435
  39. 1287
  40. 2277

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