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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 499 · 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. 1.5 × 9 =
  2. 2.11 × 9 =
  3. 3.7 × 99 =
  4. 4.14 × 99 =
  5. 5.8 × 99 =
  6. 6.10 × 9 =
  7. 7.10 × 98 =
  8. 8.17 × 99 =
  9. 9.38 × 99 =
  10. 10.6 × 19 =
  11. 11.9 × 99 =
  12. 12.7 × 19 =
  13. 13.15 × 29 =
  14. 14.9 × 98 =
  15. 15.31 × 98 =
  16. 16.14 × 98 =
  17. 17.27 × 98 =
  18. 18.14 × 29 =
  19. 19.15 × 29 =
  20. 20.8 × 29 =
  21. 21.13 × 29 =
  22. 22.3 × 19 =
  23. 23.11 × 98 =
  24. 24.13 × 98 =
  25. 25.5 × 29 =
  26. 26.11 × 9 =
  27. 27.10 × 9 =
  28. 28.14 × 99 =
  29. 29.37 × 99 =
  30. 30.5 × 19 =
  31. 31.10 × 99 =
  32. 32.4 × 49 =
  33. 33.11 × 49 =
  34. 34.5 × 49 =
  35. 35.20 × 99 =
  36. 36.33 × 98 =
  37. 37.5 × 9 =
  38. 38.18 × 99 =
  39. 39.14 × 29 =
  40. 40.9 × 49 =

Answer key

  1. 45
  2. 99
  3. 693
  4. 1386
  5. 792
  6. 90
  7. 980
  8. 1683
  9. 3762
  10. 114
  11. 891
  12. 133
  13. 435
  14. 882
  15. 3038
  16. 1372
  17. 2646
  18. 406
  19. 435
  20. 232
  21. 377
  22. 57
  23. 1078
  24. 1274
  25. 145
  26. 99
  27. 90
  28. 1386
  29. 3663
  30. 95
  31. 990
  32. 196
  33. 539
  34. 245
  35. 1980
  36. 3234
  37. 45
  38. 1782
  39. 406
  40. 441

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