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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 574 · 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. 1.15 × 49 =
  2. 2.9 × 9 =
  3. 3.8 × 99 =
  4. 4.4 × 49 =
  5. 5.11 × 49 =
  6. 6.11 × 19 =
  7. 7.4 × 19 =
  8. 8.22 × 98 =
  9. 9.37 × 98 =
  10. 10.9 × 9 =
  11. 11.36 × 99 =
  12. 12.13 × 19 =
  13. 13.8 × 49 =
  14. 14.14 × 29 =
  15. 15.3 × 49 =
  16. 16.15 × 9 =
  17. 17.15 × 19 =
  18. 18.6 × 29 =
  19. 19.8 × 49 =
  20. 20.9 × 29 =
  21. 21.6 × 29 =
  22. 22.11 × 99 =
  23. 23.14 × 29 =
  24. 24.14 × 49 =
  25. 25.4 × 9 =
  26. 26.10 × 99 =
  27. 27.3 × 9 =
  28. 28.15 × 9 =
  29. 29.3 × 9 =
  30. 30.5 × 49 =
  31. 31.5 × 9 =
  32. 32.8 × 49 =
  33. 33.9 × 29 =
  34. 34.10 × 19 =
  35. 35.4 × 99 =
  36. 36.31 × 99 =
  37. 37.13 × 49 =
  38. 38.15 × 98 =
  39. 39.15 × 98 =
  40. 40.31 × 99 =

Answer key

  1. 735
  2. 81
  3. 792
  4. 196
  5. 539
  6. 209
  7. 76
  8. 2156
  9. 3626
  10. 81
  11. 3564
  12. 247
  13. 392
  14. 406
  15. 147
  16. 135
  17. 285
  18. 174
  19. 392
  20. 261
  21. 174
  22. 1089
  23. 406
  24. 686
  25. 36
  26. 990
  27. 27
  28. 135
  29. 27
  30. 245
  31. 45
  32. 392
  33. 261
  34. 190
  35. 396
  36. 3069
  37. 637
  38. 1470
  39. 1470
  40. 3069

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