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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 469 · 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. 1.5 × 9 =
  2. 2.34 × 99 =
  3. 3.15 × 49 =
  4. 4.14 × 49 =
  5. 5.15 × 98 =
  6. 6.17 × 98 =
  7. 7.3 × 29 =
  8. 8.27 × 99 =
  9. 9.34 × 99 =
  10. 10.14 × 29 =
  11. 11.6 × 98 =
  12. 12.7 × 9 =
  13. 13.15 × 9 =
  14. 14.14 × 19 =
  15. 15.11 × 29 =
  16. 16.17 × 98 =
  17. 17.12 × 98 =
  18. 18.29 × 98 =
  19. 19.6 × 29 =
  20. 20.7 × 9 =
  21. 21.5 × 49 =
  22. 22.3 × 9 =
  23. 23.12 × 9 =
  24. 24.14 × 9 =
  25. 25.6 × 29 =
  26. 26.6 × 49 =
  27. 27.11 × 29 =
  28. 28.12 × 19 =
  29. 29.13 × 29 =
  30. 30.16 × 99 =
  31. 31.12 × 49 =
  32. 32.5 × 99 =
  33. 33.9 × 29 =
  34. 34.8 × 9 =
  35. 35.9 × 29 =
  36. 36.4 × 19 =
  37. 37.9 × 19 =
  38. 38.39 × 99 =
  39. 39.37 × 99 =
  40. 40.22 × 98 =

Answer key

  1. 45
  2. 3366
  3. 735
  4. 686
  5. 1470
  6. 1666
  7. 87
  8. 2673
  9. 3366
  10. 406
  11. 588
  12. 63
  13. 135
  14. 266
  15. 319
  16. 1666
  17. 1176
  18. 2842
  19. 174
  20. 63
  21. 245
  22. 27
  23. 108
  24. 126
  25. 174
  26. 294
  27. 319
  28. 228
  29. 377
  30. 1584
  31. 588
  32. 495
  33. 261
  34. 72
  35. 261
  36. 76
  37. 171
  38. 3861
  39. 3663
  40. 2156

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