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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 805 · 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 × 19 =
  2. 2.19 × 99 =
  3. 3.9 × 29 =
  4. 4.16 × 99 =
  5. 5.6 × 98 =
  6. 6.30 × 98 =
  7. 7.8 × 29 =
  8. 8.8 × 9 =
  9. 9.15 × 29 =
  10. 10.5 × 29 =
  11. 11.13 × 9 =
  12. 12.3 × 9 =
  13. 13.7 × 29 =
  14. 14.10 × 99 =
  15. 15.9 × 19 =
  16. 16.12 × 29 =
  17. 17.12 × 49 =
  18. 18.12 × 98 =
  19. 19.7 × 19 =
  20. 20.26 × 99 =
  21. 21.25 × 99 =
  22. 22.11 × 29 =
  23. 23.29 × 99 =
  24. 24.3 × 19 =
  25. 25.14 × 49 =
  26. 26.13 × 9 =
  27. 27.32 × 99 =
  28. 28.13 × 19 =
  29. 29.7 × 98 =
  30. 30.17 × 99 =
  31. 31.4 × 29 =
  32. 32.5 × 19 =
  33. 33.4 × 49 =
  34. 34.3 × 29 =
  35. 35.3 × 9 =
  36. 36.6 × 29 =
  37. 37.37 × 98 =
  38. 38.6 × 29 =
  39. 39.6 × 19 =
  40. 40.4 × 9 =

Answer key

  1. 285
  2. 1881
  3. 261
  4. 1584
  5. 588
  6. 2940
  7. 232
  8. 72
  9. 435
  10. 145
  11. 117
  12. 27
  13. 203
  14. 990
  15. 171
  16. 348
  17. 588
  18. 1176
  19. 133
  20. 2574
  21. 2475
  22. 319
  23. 2871
  24. 57
  25. 686
  26. 117
  27. 3168
  28. 247
  29. 686
  30. 1683
  31. 116
  32. 95
  33. 196
  34. 87
  35. 27
  36. 174
  37. 3626
  38. 174
  39. 114
  40. 36

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