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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 352 · 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. 1.3 × 9 =
  2. 2.5 × 19 =
  3. 3.5 × 9 =
  4. 4.8 × 9 =
  5. 5.3 × 19 =
  6. 6.4 × 49 =
  7. 7.9 × 49 =
  8. 8.5 × 98 =
  9. 9.10 × 9 =
  10. 10.14 × 49 =
  11. 11.7 × 9 =
  12. 12.11 × 99 =
  13. 13.32 × 98 =
  14. 14.15 × 19 =
  15. 15.3 × 49 =
  16. 16.36 × 99 =
  17. 17.14 × 49 =
  18. 18.4 × 9 =
  19. 19.10 × 9 =
  20. 20.3 × 49 =
  21. 21.14 × 29 =
  22. 22.13 × 29 =
  23. 23.4 × 29 =
  24. 24.3 × 29 =
  25. 25.29 × 99 =
  26. 26.11 × 19 =
  27. 27.11 × 29 =
  28. 28.15 × 99 =
  29. 29.12 × 29 =
  30. 30.5 × 29 =
  31. 31.5 × 19 =
  32. 32.6 × 49 =
  33. 33.10 × 29 =
  34. 34.13 × 99 =
  35. 35.3 × 29 =
  36. 36.15 × 19 =
  37. 37.7 × 19 =
  38. 38.15 × 49 =
  39. 39.4 × 19 =
  40. 40.16 × 98 =

Answer key

  1. 27
  2. 95
  3. 45
  4. 72
  5. 57
  6. 196
  7. 441
  8. 490
  9. 90
  10. 686
  11. 63
  12. 1089
  13. 3136
  14. 285
  15. 147
  16. 3564
  17. 686
  18. 36
  19. 90
  20. 147
  21. 406
  22. 377
  23. 116
  24. 87
  25. 2871
  26. 209
  27. 319
  28. 1485
  29. 348
  30. 145
  31. 95
  32. 294
  33. 290
  34. 1287
  35. 87
  36. 285
  37. 133
  38. 735
  39. 76
  40. 1568

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