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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 370 · 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. 1.15 × 99 =
  2. 2.6 × 29 =
  3. 3.14 × 19 =
  4. 4.6 × 29 =
  5. 5.3 × 29 =
  6. 6.7 × 9 =
  7. 7.28 × 98 =
  8. 8.25 × 99 =
  9. 9.8 × 19 =
  10. 10.26 × 99 =
  11. 11.39 × 99 =
  12. 12.12 × 19 =
  13. 13.5 × 9 =
  14. 14.14 × 49 =
  15. 15.26 × 99 =
  16. 16.14 × 9 =
  17. 17.13 × 9 =
  18. 18.4 × 98 =
  19. 19.28 × 98 =
  20. 20.4 × 49 =
  21. 21.3 × 29 =
  22. 22.3 × 49 =
  23. 23.11 × 49 =
  24. 24.5 × 29 =
  25. 25.4 × 49 =
  26. 26.3 × 29 =
  27. 27.14 × 9 =
  28. 28.14 × 29 =
  29. 29.13 × 9 =
  30. 30.7 × 19 =
  31. 31.15 × 49 =
  32. 32.13 × 29 =
  33. 33.12 × 9 =
  34. 34.29 × 99 =
  35. 35.13 × 19 =
  36. 36.7 × 9 =
  37. 37.31 × 99 =
  38. 38.6 × 29 =
  39. 39.16 × 99 =
  40. 40.13 × 19 =

Answer key

  1. 1485
  2. 174
  3. 266
  4. 174
  5. 87
  6. 63
  7. 2744
  8. 2475
  9. 152
  10. 2574
  11. 3861
  12. 228
  13. 45
  14. 686
  15. 2574
  16. 126
  17. 117
  18. 392
  19. 2744
  20. 196
  21. 87
  22. 147
  23. 539
  24. 145
  25. 196
  26. 87
  27. 126
  28. 406
  29. 117
  30. 133
  31. 735
  32. 377
  33. 108
  34. 2871
  35. 247
  36. 63
  37. 3069
  38. 174
  39. 1584
  40. 247

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