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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 947 · 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. 1.15 × 29 =
  2. 2.15 × 29 =
  3. 3.12 × 29 =
  4. 4.4 × 98 =
  5. 5.13 × 19 =
  6. 6.28 × 98 =
  7. 7.15 × 19 =
  8. 8.14 × 29 =
  9. 9.38 × 99 =
  10. 10.24 × 98 =
  11. 11.13 × 19 =
  12. 12.28 × 98 =
  13. 13.22 × 98 =
  14. 14.9 × 49 =
  15. 15.11 × 49 =
  16. 16.3 × 19 =
  17. 17.28 × 99 =
  18. 18.8 × 98 =
  19. 19.14 × 29 =
  20. 20.29 × 98 =
  21. 21.10 × 49 =
  22. 22.6 × 19 =
  23. 23.10 × 9 =
  24. 24.9 × 29 =
  25. 25.7 × 99 =
  26. 26.9 × 49 =
  27. 27.7 × 9 =
  28. 28.6 × 49 =
  29. 29.9 × 29 =
  30. 30.8 × 9 =
  31. 31.7 × 19 =
  32. 32.12 × 29 =
  33. 33.6 × 9 =
  34. 34.7 × 9 =
  35. 35.15 × 29 =
  36. 36.15 × 19 =
  37. 37.15 × 19 =
  38. 38.3 × 19 =
  39. 39.10 × 98 =
  40. 40.7 × 19 =

Answer key

  1. 435
  2. 435
  3. 348
  4. 392
  5. 247
  6. 2744
  7. 285
  8. 406
  9. 3762
  10. 2352
  11. 247
  12. 2744
  13. 2156
  14. 441
  15. 539
  16. 57
  17. 2772
  18. 784
  19. 406
  20. 2842
  21. 490
  22. 114
  23. 90
  24. 261
  25. 693
  26. 441
  27. 63
  28. 294
  29. 261
  30. 72
  31. 133
  32. 348
  33. 54
  34. 63
  35. 435
  36. 285
  37. 285
  38. 57
  39. 980
  40. 133

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