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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 299 · 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. 1.34 × 98 =
  2. 2.3 × 49 =
  3. 3.9 × 29 =
  4. 4.10 × 19 =
  5. 5.12 × 49 =
  6. 6.9 × 49 =
  7. 7.16 × 99 =
  8. 8.7 × 49 =
  9. 9.3 × 29 =
  10. 10.3 × 29 =
  11. 11.9 × 49 =
  12. 12.6 × 29 =
  13. 13.3 × 29 =
  14. 14.8 × 19 =
  15. 15.36 × 98 =
  16. 16.4 × 29 =
  17. 17.17 × 98 =
  18. 18.9 × 99 =
  19. 19.5 × 49 =
  20. 20.38 × 99 =
  21. 21.8 × 9 =
  22. 22.8 × 98 =
  23. 23.22 × 98 =
  24. 24.3 × 9 =
  25. 25.24 × 99 =
  26. 26.6 × 19 =
  27. 27.11 × 19 =
  28. 28.4 × 29 =
  29. 29.4 × 9 =
  30. 30.3 × 99 =
  31. 31.22 × 98 =
  32. 32.32 × 98 =
  33. 33.35 × 98 =
  34. 34.26 × 98 =
  35. 35.7 × 9 =
  36. 36.15 × 9 =
  37. 37.5 × 9 =
  38. 38.13 × 29 =
  39. 39.9 × 19 =
  40. 40.31 × 98 =

Answer key

  1. 3332
  2. 147
  3. 261
  4. 190
  5. 588
  6. 441
  7. 1584
  8. 343
  9. 87
  10. 87
  11. 441
  12. 174
  13. 87
  14. 152
  15. 3528
  16. 116
  17. 1666
  18. 891
  19. 245
  20. 3762
  21. 72
  22. 784
  23. 2156
  24. 27
  25. 2376
  26. 114
  27. 209
  28. 116
  29. 36
  30. 297
  31. 2156
  32. 3136
  33. 3430
  34. 2548
  35. 63
  36. 135
  37. 45
  38. 377
  39. 171
  40. 3038

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