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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 52 · 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 × 9 =
  2. 2.4 × 49 =
  3. 3.12 × 19 =
  4. 4.4 × 9 =
  5. 5.6 × 19 =
  6. 6.31 × 98 =
  7. 7.24 × 98 =
  8. 8.12 × 99 =
  9. 9.26 × 99 =
  10. 10.13 × 98 =
  11. 11.11 × 29 =
  12. 12.4 × 98 =
  13. 13.7 × 9 =
  14. 14.14 × 9 =
  15. 15.4 × 9 =
  16. 16.8 × 19 =
  17. 17.8 × 49 =
  18. 18.15 × 19 =
  19. 19.29 × 98 =
  20. 20.14 × 19 =
  21. 21.15 × 9 =
  22. 22.23 × 99 =
  23. 23.11 × 29 =
  24. 24.4 × 98 =
  25. 25.13 × 49 =
  26. 26.3 × 49 =
  27. 27.13 × 49 =
  28. 28.33 × 99 =
  29. 29.34 × 99 =
  30. 30.10 × 49 =
  31. 31.7 × 49 =
  32. 32.7 × 98 =
  33. 33.4 × 49 =
  34. 34.10 × 29 =
  35. 35.28 × 99 =
  36. 36.15 × 49 =
  37. 37.3 × 19 =
  38. 38.3 × 49 =
  39. 39.14 × 29 =
  40. 40.12 × 49 =

Answer key

  1. 27
  2. 196
  3. 228
  4. 36
  5. 114
  6. 3038
  7. 2352
  8. 1188
  9. 2574
  10. 1274
  11. 319
  12. 392
  13. 63
  14. 126
  15. 36
  16. 152
  17. 392
  18. 285
  19. 2842
  20. 266
  21. 135
  22. 2277
  23. 319
  24. 392
  25. 637
  26. 147
  27. 637
  28. 3267
  29. 3366
  30. 490
  31. 343
  32. 686
  33. 196
  34. 290
  35. 2772
  36. 735
  37. 57
  38. 147
  39. 406
  40. 588

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