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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 363 · 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. 1.14 × 9 =
  2. 2.11 × 99 =
  3. 3.11 × 9 =
  4. 4.3 × 29 =
  5. 5.7 × 99 =
  6. 6.6 × 9 =
  7. 7.20 × 99 =
  8. 8.22 × 98 =
  9. 9.19 × 99 =
  10. 10.10 × 9 =
  11. 11.5 × 49 =
  12. 12.4 × 29 =
  13. 13.6 × 9 =
  14. 14.38 × 99 =
  15. 15.5 × 49 =
  16. 16.15 × 19 =
  17. 17.6 × 9 =
  18. 18.13 × 9 =
  19. 19.14 × 9 =
  20. 20.24 × 98 =
  21. 21.3 × 49 =
  22. 22.14 × 49 =
  23. 23.13 × 29 =
  24. 24.6 × 19 =
  25. 25.14 × 19 =
  26. 26.14 × 49 =
  27. 27.15 × 99 =
  28. 28.29 × 99 =
  29. 29.11 × 29 =
  30. 30.8 × 98 =
  31. 31.14 × 9 =
  32. 32.9 × 29 =
  33. 33.3 × 9 =
  34. 34.11 × 19 =
  35. 35.5 × 29 =
  36. 36.7 × 99 =
  37. 37.10 × 49 =
  38. 38.3 × 9 =
  39. 39.9 × 99 =
  40. 40.10 × 19 =

Answer key

  1. 126
  2. 1089
  3. 99
  4. 87
  5. 693
  6. 54
  7. 1980
  8. 2156
  9. 1881
  10. 90
  11. 245
  12. 116
  13. 54
  14. 3762
  15. 245
  16. 285
  17. 54
  18. 117
  19. 126
  20. 2352
  21. 147
  22. 686
  23. 377
  24. 114
  25. 266
  26. 686
  27. 1485
  28. 2871
  29. 319
  30. 784
  31. 126
  32. 261
  33. 27
  34. 209
  35. 145
  36. 693
  37. 490
  38. 27
  39. 891
  40. 190

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