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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 445 · 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. 1.6 × 49 =
  2. 2.9 × 29 =
  3. 3.4 × 29 =
  4. 4.10 × 29 =
  5. 5.9 × 9 =
  6. 6.39 × 98 =
  7. 7.14 × 99 =
  8. 8.15 × 49 =
  9. 9.4 × 9 =
  10. 10.6 × 19 =
  11. 11.8 × 19 =
  12. 12.5 × 9 =
  13. 13.14 × 49 =
  14. 14.6 × 29 =
  15. 15.23 × 99 =
  16. 16.23 × 98 =
  17. 17.15 × 49 =
  18. 18.8 × 29 =
  19. 19.4 × 9 =
  20. 20.26 × 99 =
  21. 21.26 × 99 =
  22. 22.10 × 19 =
  23. 23.6 × 9 =
  24. 24.22 × 98 =
  25. 25.5 × 9 =
  26. 26.23 × 98 =
  27. 27.4 × 19 =
  28. 28.15 × 29 =
  29. 29.3 × 29 =
  30. 30.9 × 29 =
  31. 31.5 × 9 =
  32. 32.9 × 49 =
  33. 33.3 × 49 =
  34. 34.12 × 99 =
  35. 35.15 × 29 =
  36. 36.9 × 29 =
  37. 37.3 × 29 =
  38. 38.13 × 19 =
  39. 39.8 × 9 =
  40. 40.5 × 19 =

Answer key

  1. 294
  2. 261
  3. 116
  4. 290
  5. 81
  6. 3822
  7. 1386
  8. 735
  9. 36
  10. 114
  11. 152
  12. 45
  13. 686
  14. 174
  15. 2277
  16. 2254
  17. 735
  18. 232
  19. 36
  20. 2574
  21. 2574
  22. 190
  23. 54
  24. 2156
  25. 45
  26. 2254
  27. 76
  28. 435
  29. 87
  30. 261
  31. 45
  32. 441
  33. 147
  34. 1188
  35. 435
  36. 261
  37. 87
  38. 247
  39. 72
  40. 95

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