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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 490 · 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 × 9 =
  2. 2.5 × 9 =
  3. 3.9 × 98 =
  4. 4.6 × 9 =
  5. 5.11 × 9 =
  6. 6.10 × 9 =
  7. 7.13 × 9 =
  8. 8.11 × 49 =
  9. 9.19 × 99 =
  10. 10.14 × 98 =
  11. 11.5 × 19 =
  12. 12.11 × 19 =
  13. 13.9 × 19 =
  14. 14.5 × 98 =
  15. 15.6 × 9 =
  16. 16.3 × 99 =
  17. 17.19 × 98 =
  18. 18.33 × 98 =
  19. 19.7 × 49 =
  20. 20.13 × 19 =
  21. 21.5 × 9 =
  22. 22.7 × 29 =
  23. 23.5 × 9 =
  24. 24.3 × 29 =
  25. 25.15 × 19 =
  26. 26.34 × 98 =
  27. 27.5 × 19 =
  28. 28.14 × 29 =
  29. 29.5 × 49 =
  30. 30.4 × 29 =
  31. 31.6 × 29 =
  32. 32.3 × 9 =
  33. 33.24 × 99 =
  34. 34.13 × 9 =
  35. 35.38 × 98 =
  36. 36.8 × 29 =
  37. 37.8 × 49 =
  38. 38.21 × 98 =
  39. 39.5 × 98 =
  40. 40.14 × 19 =

Answer key

  1. 36
  2. 45
  3. 882
  4. 54
  5. 99
  6. 90
  7. 117
  8. 539
  9. 1881
  10. 1372
  11. 95
  12. 209
  13. 171
  14. 490
  15. 54
  16. 297
  17. 1862
  18. 3234
  19. 343
  20. 247
  21. 45
  22. 203
  23. 45
  24. 87
  25. 285
  26. 3332
  27. 95
  28. 406
  29. 245
  30. 116
  31. 174
  32. 27
  33. 2376
  34. 117
  35. 3724
  36. 232
  37. 392
  38. 2058
  39. 490
  40. 266

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