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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 470 · 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. 1.4 × 99 =
  2. 2.8 × 98 =
  3. 3.5 × 9 =
  4. 4.14 × 29 =
  5. 5.3 × 9 =
  6. 6.28 × 98 =
  7. 7.13 × 9 =
  8. 8.3 × 19 =
  9. 9.11 × 49 =
  10. 10.27 × 98 =
  11. 11.6 × 49 =
  12. 12.15 × 19 =
  13. 13.10 × 99 =
  14. 14.3 × 9 =
  15. 15.8 × 49 =
  16. 16.15 × 19 =
  17. 17.14 × 49 =
  18. 18.4 × 19 =
  19. 19.33 × 99 =
  20. 20.3 × 19 =
  21. 21.11 × 49 =
  22. 22.8 × 29 =
  23. 23.15 × 19 =
  24. 24.14 × 19 =
  25. 25.6 × 9 =
  26. 26.34 × 98 =
  27. 27.17 × 98 =
  28. 28.9 × 19 =
  29. 29.5 × 49 =
  30. 30.13 × 9 =
  31. 31.5 × 49 =
  32. 32.5 × 19 =
  33. 33.11 × 19 =
  34. 34.3 × 9 =
  35. 35.20 × 98 =
  36. 36.10 × 49 =
  37. 37.4 × 99 =
  38. 38.9 × 9 =
  39. 39.21 × 99 =
  40. 40.6 × 9 =

Answer key

  1. 396
  2. 784
  3. 45
  4. 406
  5. 27
  6. 2744
  7. 117
  8. 57
  9. 539
  10. 2646
  11. 294
  12. 285
  13. 990
  14. 27
  15. 392
  16. 285
  17. 686
  18. 76
  19. 3267
  20. 57
  21. 539
  22. 232
  23. 285
  24. 266
  25. 54
  26. 3332
  27. 1666
  28. 171
  29. 245
  30. 117
  31. 245
  32. 95
  33. 209
  34. 27
  35. 1960
  36. 490
  37. 396
  38. 81
  39. 2079
  40. 54

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