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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 870 · 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. 1.7 × 29 =
  2. 2.13 × 19 =
  3. 3.13 × 19 =
  4. 4.35 × 99 =
  5. 5.6 × 9 =
  6. 6.5 × 9 =
  7. 7.6 × 29 =
  8. 8.3 × 19 =
  9. 9.3 × 29 =
  10. 10.12 × 19 =
  11. 11.38 × 98 =
  12. 12.38 × 98 =
  13. 13.9 × 98 =
  14. 14.9 × 98 =
  15. 15.33 × 98 =
  16. 16.8 × 9 =
  17. 17.15 × 9 =
  18. 18.4 × 98 =
  19. 19.15 × 9 =
  20. 20.4 × 49 =
  21. 21.5 × 19 =
  22. 22.14 × 29 =
  23. 23.25 × 98 =
  24. 24.33 × 99 =
  25. 25.17 × 98 =
  26. 26.39 × 99 =
  27. 27.4 × 19 =
  28. 28.13 × 9 =
  29. 29.11 × 9 =
  30. 30.5 × 29 =
  31. 31.5 × 19 =
  32. 32.7 × 9 =
  33. 33.6 × 49 =
  34. 34.3 × 49 =
  35. 35.4 × 29 =
  36. 36.13 × 29 =
  37. 37.6 × 9 =
  38. 38.9 × 19 =
  39. 39.9 × 19 =
  40. 40.12 × 49 =

Answer key

  1. 203
  2. 247
  3. 247
  4. 3465
  5. 54
  6. 45
  7. 174
  8. 57
  9. 87
  10. 228
  11. 3724
  12. 3724
  13. 882
  14. 882
  15. 3234
  16. 72
  17. 135
  18. 392
  19. 135
  20. 196
  21. 95
  22. 406
  23. 2450
  24. 3267
  25. 1666
  26. 3861
  27. 76
  28. 117
  29. 99
  30. 145
  31. 95
  32. 63
  33. 294
  34. 147
  35. 116
  36. 377
  37. 54
  38. 171
  39. 171
  40. 588

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