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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 386 · 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. 2.3 × 49 =
  3. 3.18 × 99 =
  4. 4.4 × 49 =
  5. 5.26 × 99 =
  6. 6.14 × 49 =
  7. 7.5 × 19 =
  8. 8.9 × 99 =
  9. 9.8 × 98 =
  10. 10.11 × 9 =
  11. 11.5 × 19 =
  12. 12.11 × 19 =
  13. 13.30 × 99 =
  14. 14.12 × 9 =
  15. 15.10 × 19 =
  16. 16.15 × 9 =
  17. 17.5 × 9 =
  18. 18.4 × 29 =
  19. 19.3 × 19 =
  20. 20.7 × 9 =
  21. 21.26 × 98 =
  22. 22.7 × 29 =
  23. 23.27 × 98 =
  24. 24.10 × 49 =
  25. 25.4 × 49 =
  26. 26.7 × 19 =
  27. 27.13 × 19 =
  28. 28.5 × 19 =
  29. 29.12 × 9 =
  30. 30.11 × 9 =
  31. 31.4 × 19 =
  32. 32.5 × 19 =
  33. 33.13 × 49 =
  34. 34.15 × 98 =
  35. 35.33 × 98 =
  36. 36.10 × 29 =
  37. 37.33 × 98 =
  38. 38.3 × 49 =
  39. 39.7 × 19 =
  40. 40.40 × 98 =

Answer key

  1. 87
  2. 147
  3. 1782
  4. 196
  5. 2574
  6. 686
  7. 95
  8. 891
  9. 784
  10. 99
  11. 95
  12. 209
  13. 2970
  14. 108
  15. 190
  16. 135
  17. 45
  18. 116
  19. 57
  20. 63
  21. 2548
  22. 203
  23. 2646
  24. 490
  25. 196
  26. 133
  27. 247
  28. 95
  29. 108
  30. 99
  31. 76
  32. 95
  33. 637
  34. 1470
  35. 3234
  36. 290
  37. 3234
  38. 147
  39. 133
  40. 3920

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