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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 69 · 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. 1.7 × 99 =
  2. 2.6 × 49 =
  3. 3.4 × 98 =
  4. 4.4 × 49 =
  5. 5.8 × 19 =
  6. 6.21 × 99 =
  7. 7.7 × 29 =
  8. 8.3 × 49 =
  9. 9.3 × 29 =
  10. 10.7 × 19 =
  11. 11.6 × 49 =
  12. 12.7 × 29 =
  13. 13.13 × 98 =
  14. 14.13 × 29 =
  15. 15.4 × 98 =
  16. 16.10 × 9 =
  17. 17.15 × 99 =
  18. 18.7 × 29 =
  19. 19.26 × 99 =
  20. 20.29 × 99 =
  21. 21.34 × 99 =
  22. 22.6 × 49 =
  23. 23.12 × 98 =
  24. 24.7 × 98 =
  25. 25.4 × 49 =
  26. 26.15 × 98 =
  27. 27.12 × 19 =
  28. 28.19 × 98 =
  29. 29.12 × 98 =
  30. 30.26 × 99 =
  31. 31.39 × 99 =
  32. 32.18 × 98 =
  33. 33.5 × 29 =
  34. 34.13 × 19 =
  35. 35.34 × 98 =
  36. 36.14 × 19 =
  37. 37.27 × 99 =
  38. 38.4 × 19 =
  39. 39.9 × 19 =
  40. 40.10 × 19 =

Answer key

  1. 693
  2. 294
  3. 392
  4. 196
  5. 152
  6. 2079
  7. 203
  8. 147
  9. 87
  10. 133
  11. 294
  12. 203
  13. 1274
  14. 377
  15. 392
  16. 90
  17. 1485
  18. 203
  19. 2574
  20. 2871
  21. 3366
  22. 294
  23. 1176
  24. 686
  25. 196
  26. 1470
  27. 228
  28. 1862
  29. 1176
  30. 2574
  31. 3861
  32. 1764
  33. 145
  34. 247
  35. 3332
  36. 266
  37. 2673
  38. 76
  39. 171
  40. 190

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