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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 724 · 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. 1.4 × 29 =
  2. 2.8 × 49 =
  3. 3.5 × 49 =
  4. 4.13 × 19 =
  5. 5.8 × 49 =
  6. 6.39 × 98 =
  7. 7.3 × 9 =
  8. 8.5 × 9 =
  9. 9.5 × 9 =
  10. 10.14 × 29 =
  11. 11.22 × 99 =
  12. 12.10 × 49 =
  13. 13.16 × 99 =
  14. 14.9 × 19 =
  15. 15.8 × 19 =
  16. 16.5 × 98 =
  17. 17.10 × 98 =
  18. 18.5 × 98 =
  19. 19.8 × 9 =
  20. 20.13 × 98 =
  21. 21.35 × 99 =
  22. 22.9 × 49 =
  23. 23.8 × 9 =
  24. 24.7 × 98 =
  25. 25.15 × 19 =
  26. 26.13 × 99 =
  27. 27.12 × 29 =
  28. 28.15 × 19 =
  29. 29.9 × 29 =
  30. 30.3 × 99 =
  31. 31.13 × 49 =
  32. 32.20 × 99 =
  33. 33.39 × 98 =
  34. 34.13 × 98 =
  35. 35.14 × 19 =
  36. 36.8 × 29 =
  37. 37.10 × 49 =
  38. 38.29 × 98 =
  39. 39.14 × 49 =
  40. 40.7 × 19 =

Answer key

  1. 116
  2. 392
  3. 245
  4. 247
  5. 392
  6. 3822
  7. 27
  8. 45
  9. 45
  10. 406
  11. 2178
  12. 490
  13. 1584
  14. 171
  15. 152
  16. 490
  17. 980
  18. 490
  19. 72
  20. 1274
  21. 3465
  22. 441
  23. 72
  24. 686
  25. 285
  26. 1287
  27. 348
  28. 285
  29. 261
  30. 297
  31. 637
  32. 1980
  33. 3822
  34. 1274
  35. 266
  36. 232
  37. 490
  38. 2842
  39. 686
  40. 133

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