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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 393 · 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. 1.21 × 99 =
  2. 2.13 × 29 =
  3. 3.9 × 98 =
  4. 4.15 × 29 =
  5. 5.9 × 19 =
  6. 6.11 × 98 =
  7. 7.15 × 9 =
  8. 8.7 × 9 =
  9. 9.11 × 9 =
  10. 10.7 × 19 =
  11. 11.35 × 98 =
  12. 12.3 × 49 =
  13. 13.5 × 29 =
  14. 14.11 × 49 =
  15. 15.12 × 29 =
  16. 16.24 × 98 =
  17. 17.19 × 99 =
  18. 18.18 × 99 =
  19. 19.7 × 49 =
  20. 20.16 × 98 =
  21. 21.11 × 98 =
  22. 22.7 × 29 =
  23. 23.16 × 98 =
  24. 24.4 × 19 =
  25. 25.3 × 49 =
  26. 26.14 × 49 =
  27. 27.5 × 29 =
  28. 28.20 × 99 =
  29. 29.5 × 29 =
  30. 30.32 × 99 =
  31. 31.6 × 19 =
  32. 32.13 × 29 =
  33. 33.9 × 19 =
  34. 34.10 × 49 =
  35. 35.13 × 9 =
  36. 36.15 × 9 =
  37. 37.12 × 19 =
  38. 38.11 × 9 =
  39. 39.10 × 9 =
  40. 40.14 × 29 =

Answer key

  1. 2079
  2. 377
  3. 882
  4. 435
  5. 171
  6. 1078
  7. 135
  8. 63
  9. 99
  10. 133
  11. 3430
  12. 147
  13. 145
  14. 539
  15. 348
  16. 2352
  17. 1881
  18. 1782
  19. 343
  20. 1568
  21. 1078
  22. 203
  23. 1568
  24. 76
  25. 147
  26. 686
  27. 145
  28. 1980
  29. 145
  30. 3168
  31. 114
  32. 377
  33. 171
  34. 490
  35. 117
  36. 135
  37. 228
  38. 99
  39. 90
  40. 406

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