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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 504 · 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 × 9 =
  2. 2.4 × 99 =
  3. 3.7 × 29 =
  4. 4.5 × 98 =
  5. 5.8 × 9 =
  6. 6.4 × 29 =
  7. 7.30 × 98 =
  8. 8.15 × 9 =
  9. 9.9 × 29 =
  10. 10.8 × 98 =
  11. 11.10 × 29 =
  12. 12.8 × 19 =
  13. 13.32 × 98 =
  14. 14.6 × 49 =
  15. 15.8 × 19 =
  16. 16.7 × 9 =
  17. 17.22 × 99 =
  18. 18.9 × 29 =
  19. 19.10 × 19 =
  20. 20.10 × 19 =
  21. 21.15 × 29 =
  22. 22.5 × 9 =
  23. 23.13 × 98 =
  24. 24.10 × 9 =
  25. 25.4 × 19 =
  26. 26.11 × 49 =
  27. 27.5 × 9 =
  28. 28.9 × 29 =
  29. 29.6 × 9 =
  30. 30.5 × 19 =
  31. 31.24 × 99 =
  32. 32.22 × 99 =
  33. 33.4 × 29 =
  34. 34.5 × 9 =
  35. 35.3 × 9 =
  36. 36.31 × 99 =
  37. 37.13 × 9 =
  38. 38.12 × 19 =
  39. 39.15 × 9 =
  40. 40.8 × 98 =

Answer key

  1. 54
  2. 396
  3. 203
  4. 490
  5. 72
  6. 116
  7. 2940
  8. 135
  9. 261
  10. 784
  11. 290
  12. 152
  13. 3136
  14. 294
  15. 152
  16. 63
  17. 2178
  18. 261
  19. 190
  20. 190
  21. 435
  22. 45
  23. 1274
  24. 90
  25. 76
  26. 539
  27. 45
  28. 261
  29. 54
  30. 95
  31. 2376
  32. 2178
  33. 116
  34. 45
  35. 27
  36. 3069
  37. 117
  38. 228
  39. 135
  40. 784

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