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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 285 · 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. 1.8 × 29 =
  2. 2.14 × 9 =
  3. 3.36 × 99 =
  4. 4.10 × 19 =
  5. 5.12 × 29 =
  6. 6.6 × 19 =
  7. 7.9 × 98 =
  8. 8.11 × 9 =
  9. 9.8 × 29 =
  10. 10.7 × 49 =
  11. 11.18 × 99 =
  12. 12.13 × 49 =
  13. 13.13 × 19 =
  14. 14.4 × 9 =
  15. 15.13 × 9 =
  16. 16.31 × 99 =
  17. 17.5 × 9 =
  18. 18.5 × 99 =
  19. 19.11 × 49 =
  20. 20.16 × 98 =
  21. 21.5 × 49 =
  22. 22.3 × 19 =
  23. 23.3 × 9 =
  24. 24.6 × 9 =
  25. 25.14 × 49 =
  26. 26.9 × 29 =
  27. 27.7 × 9 =
  28. 28.4 × 99 =
  29. 29.11 × 29 =
  30. 30.5 × 49 =
  31. 31.15 × 99 =
  32. 32.11 × 29 =
  33. 33.9 × 9 =
  34. 34.10 × 29 =
  35. 35.38 × 98 =
  36. 36.10 × 19 =
  37. 37.6 × 9 =
  38. 38.11 × 9 =
  39. 39.10 × 19 =
  40. 40.20 × 98 =

Answer key

  1. 232
  2. 126
  3. 3564
  4. 190
  5. 348
  6. 114
  7. 882
  8. 99
  9. 232
  10. 343
  11. 1782
  12. 637
  13. 247
  14. 36
  15. 117
  16. 3069
  17. 45
  18. 495
  19. 539
  20. 1568
  21. 245
  22. 57
  23. 27
  24. 54
  25. 686
  26. 261
  27. 63
  28. 396
  29. 319
  30. 245
  31. 1485
  32. 319
  33. 81
  34. 290
  35. 3724
  36. 190
  37. 54
  38. 99
  39. 190
  40. 1960

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