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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 468 · 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 × 19 =
  2. 2.8 × 99 =
  3. 3.5 × 19 =
  4. 4.34 × 99 =
  5. 5.11 × 19 =
  6. 6.15 × 98 =
  7. 7.8 × 29 =
  8. 8.11 × 9 =
  9. 9.9 × 9 =
  10. 10.5 × 19 =
  11. 11.5 × 9 =
  12. 12.21 × 99 =
  13. 13.13 × 9 =
  14. 14.10 × 49 =
  15. 15.13 × 9 =
  16. 16.17 × 99 =
  17. 17.6 × 19 =
  18. 18.11 × 29 =
  19. 19.4 × 9 =
  20. 20.8 × 9 =
  21. 21.11 × 29 =
  22. 22.39 × 99 =
  23. 23.11 × 29 =
  24. 24.3 × 49 =
  25. 25.7 × 29 =
  26. 26.5 × 9 =
  27. 27.7 × 49 =
  28. 28.5 × 99 =
  29. 29.7 × 29 =
  30. 30.3 × 29 =
  31. 31.13 × 9 =
  32. 32.38 × 99 =
  33. 33.4 × 9 =
  34. 34.34 × 98 =
  35. 35.5 × 29 =
  36. 36.12 × 19 =
  37. 37.6 × 99 =
  38. 38.6 × 49 =
  39. 39.14 × 29 =
  40. 40.5 × 49 =

Answer key

  1. 152
  2. 792
  3. 95
  4. 3366
  5. 209
  6. 1470
  7. 232
  8. 99
  9. 81
  10. 95
  11. 45
  12. 2079
  13. 117
  14. 490
  15. 117
  16. 1683
  17. 114
  18. 319
  19. 36
  20. 72
  21. 319
  22. 3861
  23. 319
  24. 147
  25. 203
  26. 45
  27. 343
  28. 495
  29. 203
  30. 87
  31. 117
  32. 3762
  33. 36
  34. 3332
  35. 145
  36. 228
  37. 594
  38. 294
  39. 406
  40. 245

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