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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 205 · 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. 1.37 × 99 =
  2. 2.3 × 49 =
  3. 3.12 × 9 =
  4. 4.4 × 9 =
  5. 5.4 × 98 =
  6. 6.31 × 99 =
  7. 7.13 × 19 =
  8. 8.6 × 9 =
  9. 9.11 × 49 =
  10. 10.7 × 9 =
  11. 11.7 × 29 =
  12. 12.15 × 19 =
  13. 13.6 × 98 =
  14. 14.31 × 98 =
  15. 15.7 × 29 =
  16. 16.12 × 9 =
  17. 17.26 × 99 =
  18. 18.11 × 99 =
  19. 19.39 × 98 =
  20. 20.5 × 19 =
  21. 21.35 × 98 =
  22. 22.10 × 49 =
  23. 23.23 × 99 =
  24. 24.6 × 19 =
  25. 25.6 × 29 =
  26. 26.11 × 19 =
  27. 27.12 × 9 =
  28. 28.4 × 9 =
  29. 29.6 × 9 =
  30. 30.22 × 99 =
  31. 31.5 × 98 =
  32. 32.14 × 19 =
  33. 33.3 × 19 =
  34. 34.17 × 98 =
  35. 35.13 × 29 =
  36. 36.4 × 19 =
  37. 37.10 × 49 =
  38. 38.9 × 49 =
  39. 39.31 × 99 =
  40. 40.7 × 99 =

Answer key

  1. 3663
  2. 147
  3. 108
  4. 36
  5. 392
  6. 3069
  7. 247
  8. 54
  9. 539
  10. 63
  11. 203
  12. 285
  13. 588
  14. 3038
  15. 203
  16. 108
  17. 2574
  18. 1089
  19. 3822
  20. 95
  21. 3430
  22. 490
  23. 2277
  24. 114
  25. 174
  26. 209
  27. 108
  28. 36
  29. 54
  30. 2178
  31. 490
  32. 266
  33. 57
  34. 1666
  35. 377
  36. 76
  37. 490
  38. 441
  39. 3069
  40. 693

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