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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 926 · 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. 1.11 × 49 =
  2. 2.33 × 98 =
  3. 3.30 × 98 =
  4. 4.31 × 99 =
  5. 5.21 × 98 =
  6. 6.36 × 98 =
  7. 7.23 × 99 =
  8. 8.4 × 19 =
  9. 9.15 × 9 =
  10. 10.15 × 99 =
  11. 11.9 × 9 =
  12. 12.4 × 49 =
  13. 13.14 × 9 =
  14. 14.20 × 99 =
  15. 15.18 × 98 =
  16. 16.14 × 49 =
  17. 17.12 × 99 =
  18. 18.6 × 29 =
  19. 19.9 × 9 =
  20. 20.7 × 19 =
  21. 21.39 × 98 =
  22. 22.7 × 49 =
  23. 23.4 × 29 =
  24. 24.8 × 29 =
  25. 25.11 × 19 =
  26. 26.18 × 98 =
  27. 27.4 × 19 =
  28. 28.6 × 9 =
  29. 29.12 × 49 =
  30. 30.4 × 19 =
  31. 31.25 × 99 =
  32. 32.29 × 99 =
  33. 33.11 × 19 =
  34. 34.12 × 29 =
  35. 35.3 × 9 =
  36. 36.9 × 9 =
  37. 37.12 × 19 =
  38. 38.6 × 9 =
  39. 39.9 × 49 =
  40. 40.4 × 49 =

Answer key

  1. 539
  2. 3234
  3. 2940
  4. 3069
  5. 2058
  6. 3528
  7. 2277
  8. 76
  9. 135
  10. 1485
  11. 81
  12. 196
  13. 126
  14. 1980
  15. 1764
  16. 686
  17. 1188
  18. 174
  19. 81
  20. 133
  21. 3822
  22. 343
  23. 116
  24. 232
  25. 209
  26. 1764
  27. 76
  28. 54
  29. 588
  30. 76
  31. 2475
  32. 2871
  33. 209
  34. 348
  35. 27
  36. 81
  37. 228
  38. 54
  39. 441
  40. 196

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