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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 131 · 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. 1.11 × 99 =
  2. 2.4 × 9 =
  3. 3.6 × 49 =
  4. 4.6 × 19 =
  5. 5.3 × 49 =
  6. 6.9 × 9 =
  7. 7.12 × 29 =
  8. 8.13 × 9 =
  9. 9.13 × 19 =
  10. 10.5 × 49 =
  11. 11.10 × 29 =
  12. 12.4 × 29 =
  13. 13.22 × 98 =
  14. 14.12 × 19 =
  15. 15.6 × 19 =
  16. 16.31 × 98 =
  17. 17.12 × 9 =
  18. 18.4 × 19 =
  19. 19.12 × 49 =
  20. 20.10 × 29 =
  21. 21.15 × 49 =
  22. 22.14 × 9 =
  23. 23.12 × 98 =
  24. 24.4 × 49 =
  25. 25.37 × 98 =
  26. 26.12 × 29 =
  27. 27.32 × 99 =
  28. 28.7 × 19 =
  29. 29.3 × 9 =
  30. 30.4 × 49 =
  31. 31.4 × 9 =
  32. 32.12 × 9 =
  33. 33.12 × 99 =
  34. 34.24 × 99 =
  35. 35.4 × 19 =
  36. 36.27 × 98 =
  37. 37.6 × 49 =
  38. 38.10 × 19 =
  39. 39.3 × 98 =
  40. 40.6 × 9 =

Answer key

  1. 1089
  2. 36
  3. 294
  4. 114
  5. 147
  6. 81
  7. 348
  8. 117
  9. 247
  10. 245
  11. 290
  12. 116
  13. 2156
  14. 228
  15. 114
  16. 3038
  17. 108
  18. 76
  19. 588
  20. 290
  21. 735
  22. 126
  23. 1176
  24. 196
  25. 3626
  26. 348
  27. 3168
  28. 133
  29. 27
  30. 196
  31. 36
  32. 108
  33. 1188
  34. 2376
  35. 76
  36. 2646
  37. 294
  38. 190
  39. 294
  40. 54

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