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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 238 · 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. 1.10 × 49 =
  2. 2.6 × 49 =
  3. 3.3 × 19 =
  4. 4.11 × 9 =
  5. 5.31 × 99 =
  6. 6.4 × 98 =
  7. 7.32 × 98 =
  8. 8.7 × 98 =
  9. 9.7 × 9 =
  10. 10.28 × 99 =
  11. 11.5 × 19 =
  12. 12.3 × 9 =
  13. 13.32 × 99 =
  14. 14.17 × 98 =
  15. 15.14 × 9 =
  16. 16.11 × 19 =
  17. 17.4 × 9 =
  18. 18.4 × 19 =
  19. 19.6 × 99 =
  20. 20.5 × 98 =
  21. 21.5 × 19 =
  22. 22.9 × 19 =
  23. 23.3 × 29 =
  24. 24.9 × 9 =
  25. 25.8 × 29 =
  26. 26.4 × 99 =
  27. 27.9 × 29 =
  28. 28.5 × 99 =
  29. 29.15 × 19 =
  30. 30.15 × 9 =
  31. 31.4 × 19 =
  32. 32.13 × 9 =
  33. 33.6 × 19 =
  34. 34.7 × 9 =
  35. 35.27 × 98 =
  36. 36.5 × 98 =
  37. 37.28 × 98 =
  38. 38.7 × 19 =
  39. 39.18 × 99 =
  40. 40.7 × 9 =

Answer key

  1. 490
  2. 294
  3. 57
  4. 99
  5. 3069
  6. 392
  7. 3136
  8. 686
  9. 63
  10. 2772
  11. 95
  12. 27
  13. 3168
  14. 1666
  15. 126
  16. 209
  17. 36
  18. 76
  19. 594
  20. 490
  21. 95
  22. 171
  23. 87
  24. 81
  25. 232
  26. 396
  27. 261
  28. 495
  29. 285
  30. 135
  31. 76
  32. 117
  33. 114
  34. 63
  35. 2646
  36. 490
  37. 2744
  38. 133
  39. 1782
  40. 63

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