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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 640 · 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. 1.14 × 29 =
  2. 2.12 × 9 =
  3. 3.9 × 49 =
  4. 4.6 × 29 =
  5. 5.5 × 19 =
  6. 6.7 × 49 =
  7. 7.4 × 29 =
  8. 8.33 × 98 =
  9. 9.8 × 49 =
  10. 10.14 × 9 =
  11. 11.25 × 99 =
  12. 12.6 × 9 =
  13. 13.16 × 98 =
  14. 14.11 × 9 =
  15. 15.9 × 9 =
  16. 16.9 × 19 =
  17. 17.13 × 99 =
  18. 18.34 × 99 =
  19. 19.6 × 99 =
  20. 20.7 × 49 =
  21. 21.23 × 99 =
  22. 22.12 × 29 =
  23. 23.30 × 99 =
  24. 24.16 × 98 =
  25. 25.11 × 49 =
  26. 26.12 × 9 =
  27. 27.15 × 49 =
  28. 28.4 × 99 =
  29. 29.15 × 99 =
  30. 30.6 × 9 =
  31. 31.37 × 99 =
  32. 32.13 × 49 =
  33. 33.38 × 99 =
  34. 34.3 × 49 =
  35. 35.8 × 9 =
  36. 36.11 × 9 =
  37. 37.13 × 9 =
  38. 38.15 × 19 =
  39. 39.20 × 98 =
  40. 40.6 × 9 =

Answer key

  1. 406
  2. 108
  3. 441
  4. 174
  5. 95
  6. 343
  7. 116
  8. 3234
  9. 392
  10. 126
  11. 2475
  12. 54
  13. 1568
  14. 99
  15. 81
  16. 171
  17. 1287
  18. 3366
  19. 594
  20. 343
  21. 2277
  22. 348
  23. 2970
  24. 1568
  25. 539
  26. 108
  27. 735
  28. 396
  29. 1485
  30. 54
  31. 3663
  32. 637
  33. 3762
  34. 147
  35. 72
  36. 99
  37. 117
  38. 285
  39. 1960
  40. 54

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