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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 343 · 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. 1.13 × 9 =
  2. 2.8 × 19 =
  3. 3.17 × 98 =
  4. 4.14 × 19 =
  5. 5.30 × 99 =
  6. 6.15 × 19 =
  7. 7.11 × 19 =
  8. 8.5 × 9 =
  9. 9.29 × 99 =
  10. 10.5 × 29 =
  11. 11.16 × 98 =
  12. 12.17 × 99 =
  13. 13.14 × 9 =
  14. 14.8 × 9 =
  15. 15.12 × 19 =
  16. 16.5 × 49 =
  17. 17.6 × 9 =
  18. 18.15 × 9 =
  19. 19.4 × 29 =
  20. 20.15 × 29 =
  21. 21.4 × 29 =
  22. 22.4 × 29 =
  23. 23.6 × 98 =
  24. 24.7 × 49 =
  25. 25.10 × 98 =
  26. 26.10 × 29 =
  27. 27.13 × 19 =
  28. 28.15 × 9 =
  29. 29.6 × 49 =
  30. 30.12 × 19 =
  31. 31.10 × 19 =
  32. 32.9 × 99 =
  33. 33.12 × 49 =
  34. 34.12 × 49 =
  35. 35.4 × 19 =
  36. 36.3 × 9 =
  37. 37.34 × 99 =
  38. 38.12 × 9 =
  39. 39.15 × 19 =
  40. 40.37 × 99 =

Answer key

  1. 117
  2. 152
  3. 1666
  4. 266
  5. 2970
  6. 285
  7. 209
  8. 45
  9. 2871
  10. 145
  11. 1568
  12. 1683
  13. 126
  14. 72
  15. 228
  16. 245
  17. 54
  18. 135
  19. 116
  20. 435
  21. 116
  22. 116
  23. 588
  24. 343
  25. 980
  26. 290
  27. 247
  28. 135
  29. 294
  30. 228
  31. 190
  32. 891
  33. 588
  34. 588
  35. 76
  36. 27
  37. 3366
  38. 108
  39. 285
  40. 3663

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