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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 61 · 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. 2.23 × 98 =
  3. 3.11 × 19 =
  4. 4.5 × 19 =
  5. 5.3 × 9 =
  6. 6.3 × 9 =
  7. 7.3 × 19 =
  8. 8.15 × 19 =
  9. 9.14 × 19 =
  10. 10.10 × 9 =
  11. 11.7 × 9 =
  12. 12.4 × 98 =
  13. 13.6 × 19 =
  14. 14.6 × 49 =
  15. 15.9 × 99 =
  16. 16.24 × 99 =
  17. 17.20 × 98 =
  18. 18.5 × 49 =
  19. 19.8 × 19 =
  20. 20.5 × 9 =
  21. 21.33 × 98 =
  22. 22.16 × 98 =
  23. 23.25 × 98 =
  24. 24.7 × 9 =
  25. 25.12 × 19 =
  26. 26.13 × 19 =
  27. 27.16 × 98 =
  28. 28.12 × 9 =
  29. 29.13 × 19 =
  30. 30.3 × 98 =
  31. 31.3 × 9 =
  32. 32.19 × 99 =
  33. 33.19 × 98 =
  34. 34.13 × 9 =
  35. 35.14 × 49 =
  36. 36.5 × 49 =
  37. 37.5 × 49 =
  38. 38.6 × 9 =
  39. 39.15 × 19 =
  40. 40.19 × 98 =

Answer key

  1. 396
  2. 2254
  3. 209
  4. 95
  5. 27
  6. 27
  7. 57
  8. 285
  9. 266
  10. 90
  11. 63
  12. 392
  13. 114
  14. 294
  15. 891
  16. 2376
  17. 1960
  18. 245
  19. 152
  20. 45
  21. 3234
  22. 1568
  23. 2450
  24. 63
  25. 228
  26. 247
  27. 1568
  28. 108
  29. 247
  30. 294
  31. 27
  32. 1881
  33. 1862
  34. 117
  35. 686
  36. 245
  37. 245
  38. 54
  39. 285
  40. 1862

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