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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 877 · 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. 1.9 × 19 =
  2. 2.15 × 29 =
  3. 3.10 × 19 =
  4. 4.8 × 19 =
  5. 5.6 × 49 =
  6. 6.10 × 19 =
  7. 7.8 × 49 =
  8. 8.12 × 19 =
  9. 9.15 × 19 =
  10. 10.4 × 29 =
  11. 11.9 × 99 =
  12. 12.7 × 9 =
  13. 13.4 × 29 =
  14. 14.5 × 98 =
  15. 15.8 × 99 =
  16. 16.3 × 9 =
  17. 17.10 × 49 =
  18. 18.3 × 9 =
  19. 19.4 × 49 =
  20. 20.37 × 99 =
  21. 21.9 × 49 =
  22. 22.13 × 9 =
  23. 23.32 × 98 =
  24. 24.11 × 29 =
  25. 25.11 × 9 =
  26. 26.3 × 99 =
  27. 27.29 × 99 =
  28. 28.4 × 19 =
  29. 29.9 × 99 =
  30. 30.13 × 29 =
  31. 31.30 × 98 =
  32. 32.3 × 9 =
  33. 33.3 × 19 =
  34. 34.6 × 19 =
  35. 35.26 × 99 =
  36. 36.7 × 9 =
  37. 37.9 × 29 =
  38. 38.38 × 99 =
  39. 39.19 × 99 =
  40. 40.15 × 99 =

Answer key

  1. 171
  2. 435
  3. 190
  4. 152
  5. 294
  6. 190
  7. 392
  8. 228
  9. 285
  10. 116
  11. 891
  12. 63
  13. 116
  14. 490
  15. 792
  16. 27
  17. 490
  18. 27
  19. 196
  20. 3663
  21. 441
  22. 117
  23. 3136
  24. 319
  25. 99
  26. 297
  27. 2871
  28. 76
  29. 891
  30. 377
  31. 2940
  32. 27
  33. 57
  34. 114
  35. 2574
  36. 63
  37. 261
  38. 3762
  39. 1881
  40. 1485

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