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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 15 · 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. 2.6 × 19 =
  3. 3.14 × 29 =
  4. 4.15 × 9 =
  5. 5.27 × 98 =
  6. 6.11 × 29 =
  7. 7.14 × 19 =
  8. 8.30 × 98 =
  9. 9.10 × 19 =
  10. 10.13 × 9 =
  11. 11.4 × 19 =
  12. 12.5 × 19 =
  13. 13.9 × 9 =
  14. 14.39 × 98 =
  15. 15.11 × 29 =
  16. 16.36 × 98 =
  17. 17.4 × 29 =
  18. 18.15 × 19 =
  19. 19.39 × 98 =
  20. 20.3 × 49 =
  21. 21.13 × 99 =
  22. 22.6 × 29 =
  23. 23.8 × 9 =
  24. 24.8 × 98 =
  25. 25.5 × 9 =
  26. 26.5 × 19 =
  27. 27.12 × 49 =
  28. 28.4 × 98 =
  29. 29.5 × 99 =
  30. 30.14 × 29 =
  31. 31.3 × 29 =
  32. 32.6 × 99 =
  33. 33.8 × 49 =
  34. 34.9 × 9 =
  35. 35.6 × 29 =
  36. 36.4 × 98 =
  37. 37.12 × 98 =
  38. 38.4 × 9 =
  39. 39.34 × 99 =
  40. 40.12 × 19 =

Answer key

  1. 72
  2. 114
  3. 406
  4. 135
  5. 2646
  6. 319
  7. 266
  8. 2940
  9. 190
  10. 117
  11. 76
  12. 95
  13. 81
  14. 3822
  15. 319
  16. 3528
  17. 116
  18. 285
  19. 3822
  20. 147
  21. 1287
  22. 174
  23. 72
  24. 784
  25. 45
  26. 95
  27. 588
  28. 392
  29. 495
  30. 406
  31. 87
  32. 594
  33. 392
  34. 81
  35. 174
  36. 392
  37. 1176
  38. 36
  39. 3366
  40. 228

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