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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 793 · 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. 1.35 × 99 =
  2. 2.11 × 49 =
  3. 3.12 × 19 =
  4. 4.35 × 98 =
  5. 5.3 × 19 =
  6. 6.8 × 49 =
  7. 7.11 × 9 =
  8. 8.10 × 99 =
  9. 9.14 × 98 =
  10. 10.9 × 49 =
  11. 11.9 × 99 =
  12. 12.7 × 9 =
  13. 13.27 × 98 =
  14. 14.9 × 29 =
  15. 15.20 × 98 =
  16. 16.10 × 99 =
  17. 17.4 × 49 =
  18. 18.13 × 9 =
  19. 19.13 × 98 =
  20. 20.3 × 98 =
  21. 21.13 × 49 =
  22. 22.5 × 9 =
  23. 23.7 × 9 =
  24. 24.15 × 29 =
  25. 25.10 × 29 =
  26. 26.15 × 19 =
  27. 27.5 × 19 =
  28. 28.10 × 49 =
  29. 29.24 × 99 =
  30. 30.3 × 19 =
  31. 31.7 × 29 =
  32. 32.14 × 29 =
  33. 33.13 × 49 =
  34. 34.11 × 99 =
  35. 35.31 × 98 =
  36. 36.14 × 19 =
  37. 37.3 × 9 =
  38. 38.13 × 49 =
  39. 39.5 × 19 =
  40. 40.8 × 49 =

Answer key

  1. 3465
  2. 539
  3. 228
  4. 3430
  5. 57
  6. 392
  7. 99
  8. 990
  9. 1372
  10. 441
  11. 891
  12. 63
  13. 2646
  14. 261
  15. 1960
  16. 990
  17. 196
  18. 117
  19. 1274
  20. 294
  21. 637
  22. 45
  23. 63
  24. 435
  25. 290
  26. 285
  27. 95
  28. 490
  29. 2376
  30. 57
  31. 203
  32. 406
  33. 637
  34. 1089
  35. 3038
  36. 266
  37. 27
  38. 637
  39. 95
  40. 392

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