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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 210 · 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. 1.17 × 99 =
  2. 2.9 × 98 =
  3. 3.12 × 99 =
  4. 4.6 × 99 =
  5. 5.39 × 99 =
  6. 6.10 × 49 =
  7. 7.7 × 49 =
  8. 8.10 × 29 =
  9. 9.7 × 9 =
  10. 10.11 × 98 =
  11. 11.13 × 29 =
  12. 12.5 × 9 =
  13. 13.3 × 19 =
  14. 14.5 × 9 =
  15. 15.27 × 98 =
  16. 16.36 × 99 =
  17. 17.6 × 29 =
  18. 18.3 × 19 =
  19. 19.9 × 19 =
  20. 20.12 × 99 =
  21. 21.14 × 9 =
  22. 22.10 × 99 =
  23. 23.26 × 98 =
  24. 24.20 × 99 =
  25. 25.4 × 99 =
  26. 26.3 × 19 =
  27. 27.15 × 98 =
  28. 28.34 × 98 =
  29. 29.10 × 9 =
  30. 30.10 × 9 =
  31. 31.27 × 98 =
  32. 32.5 × 9 =
  33. 33.4 × 19 =
  34. 34.19 × 99 =
  35. 35.10 × 29 =
  36. 36.29 × 99 =
  37. 37.9 × 19 =
  38. 38.6 × 49 =
  39. 39.4 × 9 =
  40. 40.4 × 9 =

Answer key

  1. 1683
  2. 882
  3. 1188
  4. 594
  5. 3861
  6. 490
  7. 343
  8. 290
  9. 63
  10. 1078
  11. 377
  12. 45
  13. 57
  14. 45
  15. 2646
  16. 3564
  17. 174
  18. 57
  19. 171
  20. 1188
  21. 126
  22. 990
  23. 2548
  24. 1980
  25. 396
  26. 57
  27. 1470
  28. 3332
  29. 90
  30. 90
  31. 2646
  32. 45
  33. 76
  34. 1881
  35. 290
  36. 2871
  37. 171
  38. 294
  39. 36
  40. 36

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