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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 158 · 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. 1.29 × 98 =
  2. 2.13 × 9 =
  3. 3.23 × 99 =
  4. 4.11 × 49 =
  5. 5.4 × 9 =
  6. 6.3 × 99 =
  7. 7.5 × 29 =
  8. 8.12 × 98 =
  9. 9.38 × 98 =
  10. 10.3 × 49 =
  11. 11.4 × 98 =
  12. 12.10 × 19 =
  13. 13.19 × 98 =
  14. 14.11 × 49 =
  15. 15.11 × 99 =
  16. 16.35 × 98 =
  17. 17.33 × 99 =
  18. 18.7 × 49 =
  19. 19.10 × 19 =
  20. 20.10 × 19 =
  21. 21.4 × 9 =
  22. 22.7 × 19 =
  23. 23.10 × 9 =
  24. 24.35 × 98 =
  25. 25.22 × 98 =
  26. 26.22 × 98 =
  27. 27.14 × 49 =
  28. 28.11 × 9 =
  29. 29.4 × 9 =
  30. 30.14 × 49 =
  31. 31.10 × 9 =
  32. 32.14 × 49 =
  33. 33.15 × 49 =
  34. 34.15 × 9 =
  35. 35.14 × 29 =
  36. 36.7 × 98 =
  37. 37.7 × 9 =
  38. 38.4 × 19 =
  39. 39.38 × 99 =
  40. 40.3 × 29 =

Answer key

  1. 2842
  2. 117
  3. 2277
  4. 539
  5. 36
  6. 297
  7. 145
  8. 1176
  9. 3724
  10. 147
  11. 392
  12. 190
  13. 1862
  14. 539
  15. 1089
  16. 3430
  17. 3267
  18. 343
  19. 190
  20. 190
  21. 36
  22. 133
  23. 90
  24. 3430
  25. 2156
  26. 2156
  27. 686
  28. 99
  29. 36
  30. 686
  31. 90
  32. 686
  33. 735
  34. 135
  35. 406
  36. 686
  37. 63
  38. 76
  39. 3762
  40. 87

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