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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 801 · 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 × 99 =
  2. 2.9 × 99 =
  3. 3.13 × 49 =
  4. 4.12 × 9 =
  5. 5.35 × 98 =
  6. 6.21 × 98 =
  7. 7.5 × 19 =
  8. 8.14 × 29 =
  9. 9.3 × 29 =
  10. 10.14 × 99 =
  11. 11.13 × 19 =
  12. 12.15 × 99 =
  13. 13.8 × 49 =
  14. 14.4 × 49 =
  15. 15.13 × 29 =
  16. 16.15 × 9 =
  17. 17.7 × 9 =
  18. 18.35 × 99 =
  19. 19.9 × 98 =
  20. 20.10 × 29 =
  21. 21.4 × 9 =
  22. 22.13 × 49 =
  23. 23.11 × 29 =
  24. 24.11 × 99 =
  25. 25.7 × 29 =
  26. 26.4 × 29 =
  27. 27.14 × 19 =
  28. 28.4 × 9 =
  29. 29.6 × 19 =
  30. 30.7 × 98 =
  31. 31.35 × 99 =
  32. 32.28 × 99 =
  33. 33.6 × 29 =
  34. 34.26 × 99 =
  35. 35.7 × 29 =
  36. 36.11 × 9 =
  37. 37.10 × 49 =
  38. 38.12 × 49 =
  39. 39.5 × 9 =
  40. 40.6 × 98 =

Answer key

  1. 1485
  2. 891
  3. 637
  4. 108
  5. 3430
  6. 2058
  7. 95
  8. 406
  9. 87
  10. 1386
  11. 247
  12. 1485
  13. 392
  14. 196
  15. 377
  16. 135
  17. 63
  18. 3465
  19. 882
  20. 290
  21. 36
  22. 637
  23. 319
  24. 1089
  25. 203
  26. 116
  27. 266
  28. 36
  29. 114
  30. 686
  31. 3465
  32. 2772
  33. 174
  34. 2574
  35. 203
  36. 99
  37. 490
  38. 588
  39. 45
  40. 588

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