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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 464 · 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. 1.11 × 99 =
  2. 2.14 × 49 =
  3. 3.8 × 9 =
  4. 4.4 × 98 =
  5. 5.15 × 9 =
  6. 6.13 × 19 =
  7. 7.11 × 29 =
  8. 8.12 × 19 =
  9. 9.5 × 9 =
  10. 10.3 × 19 =
  11. 11.10 × 9 =
  12. 12.6 × 19 =
  13. 13.13 × 19 =
  14. 14.40 × 99 =
  15. 15.9 × 19 =
  16. 16.10 × 9 =
  17. 17.13 × 99 =
  18. 18.13 × 49 =
  19. 19.10 × 29 =
  20. 20.12 × 49 =
  21. 21.9 × 9 =
  22. 22.12 × 9 =
  23. 23.12 × 49 =
  24. 24.12 × 29 =
  25. 25.5 × 19 =
  26. 26.11 × 9 =
  27. 27.37 × 98 =
  28. 28.12 × 49 =
  29. 29.8 × 29 =
  30. 30.10 × 9 =
  31. 31.5 × 19 =
  32. 32.14 × 98 =
  33. 33.3 × 99 =
  34. 34.25 × 99 =
  35. 35.11 × 98 =
  36. 36.30 × 98 =
  37. 37.21 × 98 =
  38. 38.11 × 29 =
  39. 39.3 × 99 =
  40. 40.3 × 98 =

Answer key

  1. 1089
  2. 686
  3. 72
  4. 392
  5. 135
  6. 247
  7. 319
  8. 228
  9. 45
  10. 57
  11. 90
  12. 114
  13. 247
  14. 3960
  15. 171
  16. 90
  17. 1287
  18. 637
  19. 290
  20. 588
  21. 81
  22. 108
  23. 588
  24. 348
  25. 95
  26. 99
  27. 3626
  28. 588
  29. 232
  30. 90
  31. 95
  32. 1372
  33. 297
  34. 2475
  35. 1078
  36. 2940
  37. 2058
  38. 319
  39. 297
  40. 294

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