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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 678 · 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. 1.3 × 19 =
  2. 2.5 × 19 =
  3. 3.7 × 9 =
  4. 4.15 × 29 =
  5. 5.10 × 19 =
  6. 6.20 × 98 =
  7. 7.3 × 9 =
  8. 8.13 × 19 =
  9. 9.6 × 19 =
  10. 10.7 × 9 =
  11. 11.9 × 29 =
  12. 12.8 × 29 =
  13. 13.3 × 19 =
  14. 14.5 × 19 =
  15. 15.37 × 98 =
  16. 16.12 × 19 =
  17. 17.11 × 19 =
  18. 18.10 × 19 =
  19. 19.5 × 49 =
  20. 20.10 × 49 =
  21. 21.12 × 9 =
  22. 22.8 × 99 =
  23. 23.12 × 49 =
  24. 24.12 × 49 =
  25. 25.3 × 19 =
  26. 26.5 × 19 =
  27. 27.35 × 98 =
  28. 28.11 × 29 =
  29. 29.39 × 98 =
  30. 30.8 × 19 =
  31. 31.33 × 98 =
  32. 32.4 × 98 =
  33. 33.11 × 49 =
  34. 34.5 × 49 =
  35. 35.11 × 9 =
  36. 36.31 × 99 =
  37. 37.5 × 9 =
  38. 38.5 × 99 =
  39. 39.5 × 98 =
  40. 40.13 × 98 =

Answer key

  1. 57
  2. 95
  3. 63
  4. 435
  5. 190
  6. 1960
  7. 27
  8. 247
  9. 114
  10. 63
  11. 261
  12. 232
  13. 57
  14. 95
  15. 3626
  16. 228
  17. 209
  18. 190
  19. 245
  20. 490
  21. 108
  22. 792
  23. 588
  24. 588
  25. 57
  26. 95
  27. 3430
  28. 319
  29. 3822
  30. 152
  31. 3234
  32. 392
  33. 539
  34. 245
  35. 99
  36. 3069
  37. 45
  38. 495
  39. 490
  40. 1274

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