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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 846 · 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. 1.13 × 9 =
  2. 2.10 × 9 =
  3. 3.7 × 29 =
  4. 4.10 × 9 =
  5. 5.5 × 29 =
  6. 6.8 × 99 =
  7. 7.15 × 49 =
  8. 8.6 × 19 =
  9. 9.12 × 99 =
  10. 10.36 × 99 =
  11. 11.4 × 19 =
  12. 12.34 × 98 =
  13. 13.10 × 49 =
  14. 14.9 × 99 =
  15. 15.35 × 98 =
  16. 16.14 × 49 =
  17. 17.3 × 98 =
  18. 18.13 × 29 =
  19. 19.13 × 9 =
  20. 20.15 × 19 =
  21. 21.23 × 98 =
  22. 22.8 × 9 =
  23. 23.15 × 9 =
  24. 24.6 × 49 =
  25. 25.8 × 49 =
  26. 26.9 × 49 =
  27. 27.31 × 98 =
  28. 28.14 × 19 =
  29. 29.6 × 9 =
  30. 30.7 × 49 =
  31. 31.9 × 99 =
  32. 32.15 × 29 =
  33. 33.23 × 98 =
  34. 34.10 × 29 =
  35. 35.11 × 99 =
  36. 36.23 × 98 =
  37. 37.11 × 29 =
  38. 38.11 × 9 =
  39. 39.9 × 19 =
  40. 40.5 × 29 =

Answer key

  1. 117
  2. 90
  3. 203
  4. 90
  5. 145
  6. 792
  7. 735
  8. 114
  9. 1188
  10. 3564
  11. 76
  12. 3332
  13. 490
  14. 891
  15. 3430
  16. 686
  17. 294
  18. 377
  19. 117
  20. 285
  21. 2254
  22. 72
  23. 135
  24. 294
  25. 392
  26. 441
  27. 3038
  28. 266
  29. 54
  30. 343
  31. 891
  32. 435
  33. 2254
  34. 290
  35. 1089
  36. 2254
  37. 319
  38. 99
  39. 171
  40. 145

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