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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 105 · 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. 1.4 × 9 =
  2. 2.13 × 19 =
  3. 3.6 × 98 =
  4. 4.13 × 29 =
  5. 5.13 × 9 =
  6. 6.19 × 99 =
  7. 7.7 × 49 =
  8. 8.4 × 19 =
  9. 9.32 × 98 =
  10. 10.11 × 98 =
  11. 11.16 × 99 =
  12. 12.31 × 98 =
  13. 13.14 × 9 =
  14. 14.4 × 49 =
  15. 15.7 × 98 =
  16. 16.8 × 29 =
  17. 17.20 × 98 =
  18. 18.13 × 19 =
  19. 19.5 × 29 =
  20. 20.4 × 29 =
  21. 21.3 × 19 =
  22. 22.10 × 19 =
  23. 23.6 × 9 =
  24. 24.7 × 29 =
  25. 25.15 × 99 =
  26. 26.8 × 19 =
  27. 27.4 × 19 =
  28. 28.15 × 49 =
  29. 29.34 × 99 =
  30. 30.17 × 99 =
  31. 31.35 × 99 =
  32. 32.3 × 99 =
  33. 33.28 × 99 =
  34. 34.34 × 99 =
  35. 35.9 × 49 =
  36. 36.6 × 9 =
  37. 37.10 × 29 =
  38. 38.7 × 98 =
  39. 39.13 × 98 =
  40. 40.3 × 9 =

Answer key

  1. 36
  2. 247
  3. 588
  4. 377
  5. 117
  6. 1881
  7. 343
  8. 76
  9. 3136
  10. 1078
  11. 1584
  12. 3038
  13. 126
  14. 196
  15. 686
  16. 232
  17. 1960
  18. 247
  19. 145
  20. 116
  21. 57
  22. 190
  23. 54
  24. 203
  25. 1485
  26. 152
  27. 76
  28. 735
  29. 3366
  30. 1683
  31. 3465
  32. 297
  33. 2772
  34. 3366
  35. 441
  36. 54
  37. 290
  38. 686
  39. 1274
  40. 27

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