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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 360 · 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. 1.12 × 99 =
  2. 2.33 × 99 =
  3. 3.13 × 29 =
  4. 4.5 × 29 =
  5. 5.10 × 29 =
  6. 6.7 × 19 =
  7. 7.12 × 29 =
  8. 8.32 × 99 =
  9. 9.9 × 49 =
  10. 10.15 × 9 =
  11. 11.28 × 99 =
  12. 12.10 × 29 =
  13. 13.15 × 9 =
  14. 14.15 × 49 =
  15. 15.6 × 49 =
  16. 16.31 × 99 =
  17. 17.9 × 19 =
  18. 18.5 × 19 =
  19. 19.12 × 49 =
  20. 20.8 × 19 =
  21. 21.9 × 98 =
  22. 22.11 × 49 =
  23. 23.6 × 9 =
  24. 24.13 × 9 =
  25. 25.6 × 9 =
  26. 26.5 × 98 =
  27. 27.37 × 98 =
  28. 28.5 × 9 =
  29. 29.15 × 99 =
  30. 30.5 × 19 =
  31. 31.3 × 49 =
  32. 32.13 × 98 =
  33. 33.17 × 98 =
  34. 34.5 × 9 =
  35. 35.21 × 99 =
  36. 36.6 × 49 =
  37. 37.7 × 19 =
  38. 38.3 × 19 =
  39. 39.4 × 49 =
  40. 40.12 × 9 =

Answer key

  1. 1188
  2. 3267
  3. 377
  4. 145
  5. 290
  6. 133
  7. 348
  8. 3168
  9. 441
  10. 135
  11. 2772
  12. 290
  13. 135
  14. 735
  15. 294
  16. 3069
  17. 171
  18. 95
  19. 588
  20. 152
  21. 882
  22. 539
  23. 54
  24. 117
  25. 54
  26. 490
  27. 3626
  28. 45
  29. 1485
  30. 95
  31. 147
  32. 1274
  33. 1666
  34. 45
  35. 2079
  36. 294
  37. 133
  38. 57
  39. 196
  40. 108

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