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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 664 · 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. 1.6 × 29 =
  2. 2.7 × 99 =
  3. 3.15 × 9 =
  4. 4.21 × 99 =
  5. 5.20 × 98 =
  6. 6.8 × 9 =
  7. 7.10 × 49 =
  8. 8.8 × 9 =
  9. 9.36 × 99 =
  10. 10.4 × 49 =
  11. 11.11 × 19 =
  12. 12.15 × 49 =
  13. 13.39 × 98 =
  14. 14.4 × 49 =
  15. 15.7 × 9 =
  16. 16.24 × 99 =
  17. 17.13 × 29 =
  18. 18.3 × 19 =
  19. 19.7 × 19 =
  20. 20.10 × 29 =
  21. 21.14 × 19 =
  22. 22.5 × 49 =
  23. 23.8 × 99 =
  24. 24.24 × 98 =
  25. 25.11 × 29 =
  26. 26.18 × 98 =
  27. 27.11 × 49 =
  28. 28.7 × 49 =
  29. 29.14 × 29 =
  30. 30.6 × 9 =
  31. 31.12 × 29 =
  32. 32.6 × 19 =
  33. 33.3 × 9 =
  34. 34.11 × 99 =
  35. 35.11 × 29 =
  36. 36.9 × 49 =
  37. 37.12 × 99 =
  38. 38.14 × 49 =
  39. 39.15 × 19 =
  40. 40.12 × 49 =

Answer key

  1. 174
  2. 693
  3. 135
  4. 2079
  5. 1960
  6. 72
  7. 490
  8. 72
  9. 3564
  10. 196
  11. 209
  12. 735
  13. 3822
  14. 196
  15. 63
  16. 2376
  17. 377
  18. 57
  19. 133
  20. 290
  21. 266
  22. 245
  23. 792
  24. 2352
  25. 319
  26. 1764
  27. 539
  28. 343
  29. 406
  30. 54
  31. 348
  32. 114
  33. 27
  34. 1089
  35. 319
  36. 441
  37. 1188
  38. 686
  39. 285
  40. 588

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