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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 335 · 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. 1.8 × 19 =
  2. 2.5 × 29 =
  3. 3.7 × 49 =
  4. 4.5 × 49 =
  5. 5.3 × 49 =
  6. 6.8 × 19 =
  7. 7.4 × 29 =
  8. 8.39 × 98 =
  9. 9.14 × 9 =
  10. 10.5 × 9 =
  11. 11.13 × 98 =
  12. 12.11 × 9 =
  13. 13.12 × 19 =
  14. 14.7 × 49 =
  15. 15.10 × 9 =
  16. 16.4 × 9 =
  17. 17.13 × 9 =
  18. 18.36 × 99 =
  19. 19.12 × 29 =
  20. 20.33 × 98 =
  21. 21.19 × 99 =
  22. 22.29 × 98 =
  23. 23.9 × 19 =
  24. 24.6 × 9 =
  25. 25.17 × 98 =
  26. 26.6 × 49 =
  27. 27.6 × 19 =
  28. 28.7 × 49 =
  29. 29.14 × 49 =
  30. 30.4 × 9 =
  31. 31.24 × 99 =
  32. 32.4 × 9 =
  33. 33.11 × 29 =
  34. 34.38 × 98 =
  35. 35.8 × 49 =
  36. 36.4 × 29 =
  37. 37.33 × 98 =
  38. 38.9 × 29 =
  39. 39.26 × 98 =
  40. 40.6 × 49 =

Answer key

  1. 152
  2. 145
  3. 343
  4. 245
  5. 147
  6. 152
  7. 116
  8. 3822
  9. 126
  10. 45
  11. 1274
  12. 99
  13. 228
  14. 343
  15. 90
  16. 36
  17. 117
  18. 3564
  19. 348
  20. 3234
  21. 1881
  22. 2842
  23. 171
  24. 54
  25. 1666
  26. 294
  27. 114
  28. 343
  29. 686
  30. 36
  31. 2376
  32. 36
  33. 319
  34. 3724
  35. 392
  36. 116
  37. 3234
  38. 261
  39. 2548
  40. 294

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