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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 918 · 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 × 49 =
  2. 2.7 × 19 =
  3. 3.4 × 19 =
  4. 4.10 × 19 =
  5. 5.12 × 9 =
  6. 6.5 × 9 =
  7. 7.13 × 29 =
  8. 8.12 × 9 =
  9. 9.33 × 99 =
  10. 10.20 × 98 =
  11. 11.6 × 49 =
  12. 12.6 × 19 =
  13. 13.32 × 98 =
  14. 14.6 × 9 =
  15. 15.5 × 9 =
  16. 16.7 × 9 =
  17. 17.8 × 99 =
  18. 18.23 × 98 =
  19. 19.11 × 19 =
  20. 20.13 × 49 =
  21. 21.13 × 19 =
  22. 22.3 × 29 =
  23. 23.26 × 98 =
  24. 24.10 × 29 =
  25. 25.9 × 98 =
  26. 26.9 × 29 =
  27. 27.29 × 98 =
  28. 28.13 × 19 =
  29. 29.15 × 19 =
  30. 30.8 × 29 =
  31. 31.7 × 9 =
  32. 32.17 × 99 =
  33. 33.27 × 99 =
  34. 34.13 × 9 =
  35. 35.7 × 19 =
  36. 36.9 × 19 =
  37. 37.3 × 9 =
  38. 38.4 × 49 =
  39. 39.10 × 9 =
  40. 40.14 × 98 =

Answer key

  1. 343
  2. 133
  3. 76
  4. 190
  5. 108
  6. 45
  7. 377
  8. 108
  9. 3267
  10. 1960
  11. 294
  12. 114
  13. 3136
  14. 54
  15. 45
  16. 63
  17. 792
  18. 2254
  19. 209
  20. 637
  21. 247
  22. 87
  23. 2548
  24. 290
  25. 882
  26. 261
  27. 2842
  28. 247
  29. 285
  30. 232
  31. 63
  32. 1683
  33. 2673
  34. 117
  35. 133
  36. 171
  37. 27
  38. 196
  39. 90
  40. 1372

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