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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 891 · 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. 1.12 × 29 =
  2. 2.23 × 98 =
  3. 3.4 × 9 =
  4. 4.13 × 9 =
  5. 5.10 × 19 =
  6. 6.8 × 49 =
  7. 7.14 × 29 =
  8. 8.36 × 99 =
  9. 9.33 × 99 =
  10. 10.5 × 9 =
  11. 11.3 × 19 =
  12. 12.23 × 99 =
  13. 13.7 × 99 =
  14. 14.11 × 29 =
  15. 15.15 × 99 =
  16. 16.11 × 19 =
  17. 17.29 × 98 =
  18. 18.6 × 49 =
  19. 19.8 × 19 =
  20. 20.29 × 99 =
  21. 21.15 × 49 =
  22. 22.34 × 99 =
  23. 23.10 × 98 =
  24. 24.13 × 19 =
  25. 25.15 × 29 =
  26. 26.29 × 98 =
  27. 27.7 × 19 =
  28. 28.7 × 19 =
  29. 29.5 × 29 =
  30. 30.8 × 9 =
  31. 31.6 × 29 =
  32. 32.14 × 19 =
  33. 33.6 × 49 =
  34. 34.9 × 29 =
  35. 35.13 × 9 =
  36. 36.11 × 9 =
  37. 37.7 × 49 =
  38. 38.36 × 99 =
  39. 39.13 × 29 =
  40. 40.4 × 98 =

Answer key

  1. 348
  2. 2254
  3. 36
  4. 117
  5. 190
  6. 392
  7. 406
  8. 3564
  9. 3267
  10. 45
  11. 57
  12. 2277
  13. 693
  14. 319
  15. 1485
  16. 209
  17. 2842
  18. 294
  19. 152
  20. 2871
  21. 735
  22. 3366
  23. 980
  24. 247
  25. 435
  26. 2842
  27. 133
  28. 133
  29. 145
  30. 72
  31. 174
  32. 266
  33. 294
  34. 261
  35. 117
  36. 99
  37. 343
  38. 3564
  39. 377
  40. 392

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