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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 375 · 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. 1.12 × 98 =
  2. 2.5 × 9 =
  3. 3.8 × 98 =
  4. 4.12 × 98 =
  5. 5.13 × 49 =
  6. 6.21 × 99 =
  7. 7.15 × 99 =
  8. 8.4 × 19 =
  9. 9.14 × 49 =
  10. 10.3 × 9 =
  11. 11.5 × 19 =
  12. 12.6 × 19 =
  13. 13.36 × 99 =
  14. 14.7 × 29 =
  15. 15.4 × 29 =
  16. 16.15 × 19 =
  17. 17.5 × 29 =
  18. 18.11 × 19 =
  19. 19.14 × 19 =
  20. 20.12 × 19 =
  21. 21.36 × 98 =
  22. 22.12 × 9 =
  23. 23.36 × 98 =
  24. 24.9 × 99 =
  25. 25.3 × 29 =
  26. 26.3 × 29 =
  27. 27.10 × 99 =
  28. 28.8 × 9 =
  29. 29.8 × 49 =
  30. 30.9 × 9 =
  31. 31.3 × 9 =
  32. 32.12 × 29 =
  33. 33.6 × 19 =
  34. 34.3 × 49 =
  35. 35.10 × 9 =
  36. 36.4 × 9 =
  37. 37.6 × 19 =
  38. 38.14 × 19 =
  39. 39.8 × 9 =
  40. 40.6 × 98 =

Answer key

  1. 1176
  2. 45
  3. 784
  4. 1176
  5. 637
  6. 2079
  7. 1485
  8. 76
  9. 686
  10. 27
  11. 95
  12. 114
  13. 3564
  14. 203
  15. 116
  16. 285
  17. 145
  18. 209
  19. 266
  20. 228
  21. 3528
  22. 108
  23. 3528
  24. 891
  25. 87
  26. 87
  27. 990
  28. 72
  29. 392
  30. 81
  31. 27
  32. 348
  33. 114
  34. 147
  35. 90
  36. 36
  37. 114
  38. 266
  39. 72
  40. 588

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