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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 821 · 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. 1.3 × 29 =
  2. 2.13 × 19 =
  3. 3.8 × 29 =
  4. 4.11 × 19 =
  5. 5.4 × 49 =
  6. 6.37 × 99 =
  7. 7.10 × 9 =
  8. 8.13 × 9 =
  9. 9.15 × 19 =
  10. 10.5 × 49 =
  11. 11.6 × 29 =
  12. 12.6 × 98 =
  13. 13.5 × 29 =
  14. 14.5 × 49 =
  15. 15.10 × 49 =
  16. 16.9 × 19 =
  17. 17.14 × 49 =
  18. 18.39 × 99 =
  19. 19.35 × 99 =
  20. 20.14 × 19 =
  21. 21.14 × 29 =
  22. 22.7 × 19 =
  23. 23.9 × 9 =
  24. 24.5 × 9 =
  25. 25.8 × 49 =
  26. 26.13 × 98 =
  27. 27.23 × 98 =
  28. 28.14 × 29 =
  29. 29.4 × 49 =
  30. 30.5 × 9 =
  31. 31.14 × 29 =
  32. 32.11 × 99 =
  33. 33.4 × 98 =
  34. 34.9 × 29 =
  35. 35.3 × 98 =
  36. 36.10 × 9 =
  37. 37.14 × 99 =
  38. 38.13 × 19 =
  39. 39.13 × 29 =
  40. 40.23 × 98 =

Answer key

  1. 87
  2. 247
  3. 232
  4. 209
  5. 196
  6. 3663
  7. 90
  8. 117
  9. 285
  10. 245
  11. 174
  12. 588
  13. 145
  14. 245
  15. 490
  16. 171
  17. 686
  18. 3861
  19. 3465
  20. 266
  21. 406
  22. 133
  23. 81
  24. 45
  25. 392
  26. 1274
  27. 2254
  28. 406
  29. 196
  30. 45
  31. 406
  32. 1089
  33. 392
  34. 261
  35. 294
  36. 90
  37. 1386
  38. 247
  39. 377
  40. 2254

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