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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 9 · 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 × 9 =
  2. 2.8 × 19 =
  3. 3.11 × 29 =
  4. 4.5 × 19 =
  5. 5.11 × 49 =
  6. 6.6 × 19 =
  7. 7.11 × 29 =
  8. 8.12 × 49 =
  9. 9.8 × 49 =
  10. 10.15 × 29 =
  11. 11.6 × 29 =
  12. 12.35 × 99 =
  13. 13.6 × 9 =
  14. 14.6 × 9 =
  15. 15.25 × 98 =
  16. 16.7 × 9 =
  17. 17.26 × 99 =
  18. 18.11 × 29 =
  19. 19.29 × 99 =
  20. 20.10 × 9 =
  21. 21.8 × 19 =
  22. 22.12 × 49 =
  23. 23.35 × 99 =
  24. 24.5 × 19 =
  25. 25.9 × 19 =
  26. 26.6 × 19 =
  27. 27.15 × 29 =
  28. 28.33 × 98 =
  29. 29.7 × 19 =
  30. 30.14 × 49 =
  31. 31.5 × 29 =
  32. 32.3 × 9 =
  33. 33.7 × 49 =
  34. 34.5 × 19 =
  35. 35.15 × 29 =
  36. 36.31 × 98 =
  37. 37.4 × 29 =
  38. 38.12 × 19 =
  39. 39.29 × 99 =
  40. 40.6 × 49 =

Answer key

  1. 72
  2. 152
  3. 319
  4. 95
  5. 539
  6. 114
  7. 319
  8. 588
  9. 392
  10. 435
  11. 174
  12. 3465
  13. 54
  14. 54
  15. 2450
  16. 63
  17. 2574
  18. 319
  19. 2871
  20. 90
  21. 152
  22. 588
  23. 3465
  24. 95
  25. 171
  26. 114
  27. 435
  28. 3234
  29. 133
  30. 686
  31. 145
  32. 27
  33. 343
  34. 95
  35. 435
  36. 3038
  37. 116
  38. 228
  39. 2871
  40. 294

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