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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 527 · 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. 1.21 × 99 =
  2. 2.14 × 9 =
  3. 3.10 × 29 =
  4. 4.6 × 98 =
  5. 5.4 × 98 =
  6. 6.22 × 98 =
  7. 7.8 × 49 =
  8. 8.32 × 99 =
  9. 9.4 × 9 =
  10. 10.6 × 19 =
  11. 11.3 × 19 =
  12. 12.14 × 19 =
  13. 13.9 × 49 =
  14. 14.12 × 98 =
  15. 15.14 × 19 =
  16. 16.7 × 49 =
  17. 17.10 × 9 =
  18. 18.14 × 49 =
  19. 19.3 × 98 =
  20. 20.10 × 98 =
  21. 21.12 × 19 =
  22. 22.8 × 9 =
  23. 23.3 × 19 =
  24. 24.9 × 9 =
  25. 25.7 × 19 =
  26. 26.10 × 29 =
  27. 27.5 × 19 =
  28. 28.5 × 9 =
  29. 29.29 × 98 =
  30. 30.14 × 49 =
  31. 31.10 × 19 =
  32. 32.10 × 49 =
  33. 33.13 × 29 =
  34. 34.15 × 49 =
  35. 35.17 × 99 =
  36. 36.12 × 9 =
  37. 37.14 × 19 =
  38. 38.8 × 49 =
  39. 39.3 × 49 =
  40. 40.19 × 98 =

Answer key

  1. 2079
  2. 126
  3. 290
  4. 588
  5. 392
  6. 2156
  7. 392
  8. 3168
  9. 36
  10. 114
  11. 57
  12. 266
  13. 441
  14. 1176
  15. 266
  16. 343
  17. 90
  18. 686
  19. 294
  20. 980
  21. 228
  22. 72
  23. 57
  24. 81
  25. 133
  26. 290
  27. 95
  28. 45
  29. 2842
  30. 686
  31. 190
  32. 490
  33. 377
  34. 735
  35. 1683
  36. 108
  37. 266
  38. 392
  39. 147
  40. 1862

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