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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 17 · 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 × 9 =
  2. 2.6 × 29 =
  3. 3.8 × 9 =
  4. 4.13 × 98 =
  5. 5.4 × 9 =
  6. 6.13 × 9 =
  7. 7.9 × 29 =
  8. 8.4 × 49 =
  9. 9.10 × 9 =
  10. 10.7 × 49 =
  11. 11.34 × 98 =
  12. 12.3 × 29 =
  13. 13.10 × 9 =
  14. 14.8 × 19 =
  15. 15.7 × 98 =
  16. 16.17 × 99 =
  17. 17.8 × 98 =
  18. 18.14 × 9 =
  19. 19.12 × 98 =
  20. 20.12 × 49 =
  21. 21.6 × 98 =
  22. 22.4 × 98 =
  23. 23.11 × 19 =
  24. 24.6 × 98 =
  25. 25.14 × 9 =
  26. 26.12 × 9 =
  27. 27.8 × 19 =
  28. 28.18 × 98 =
  29. 29.4 × 98 =
  30. 30.6 × 19 =
  31. 31.36 × 98 =
  32. 32.5 × 29 =
  33. 33.6 × 19 =
  34. 34.7 × 19 =
  35. 35.15 × 19 =
  36. 36.9 × 99 =
  37. 37.5 × 19 =
  38. 38.4 × 19 =
  39. 39.13 × 19 =
  40. 40.4 × 49 =

Answer key

  1. 135
  2. 174
  3. 72
  4. 1274
  5. 36
  6. 117
  7. 261
  8. 196
  9. 90
  10. 343
  11. 3332
  12. 87
  13. 90
  14. 152
  15. 686
  16. 1683
  17. 784
  18. 126
  19. 1176
  20. 588
  21. 588
  22. 392
  23. 209
  24. 588
  25. 126
  26. 108
  27. 152
  28. 1764
  29. 392
  30. 114
  31. 3528
  32. 145
  33. 114
  34. 133
  35. 285
  36. 891
  37. 95
  38. 76
  39. 247
  40. 196

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