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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 180 · 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. 1.5 × 49 =
  2. 2.8 × 9 =
  3. 3.11 × 9 =
  4. 4.5 × 9 =
  5. 5.3 × 49 =
  6. 6.14 × 9 =
  7. 7.6 × 19 =
  8. 8.25 × 98 =
  9. 9.14 × 49 =
  10. 10.4 × 99 =
  11. 11.19 × 98 =
  12. 12.6 × 19 =
  13. 13.7 × 49 =
  14. 14.15 × 9 =
  15. 15.9 × 9 =
  16. 16.5 × 9 =
  17. 17.11 × 49 =
  18. 18.40 × 99 =
  19. 19.10 × 19 =
  20. 20.9 × 9 =
  21. 21.21 × 98 =
  22. 22.11 × 19 =
  23. 23.6 × 9 =
  24. 24.11 × 49 =
  25. 25.7 × 29 =
  26. 26.13 × 19 =
  27. 27.9 × 29 =
  28. 28.9 × 99 =
  29. 29.23 × 99 =
  30. 30.5 × 49 =
  31. 31.4 × 19 =
  32. 32.15 × 9 =
  33. 33.3 × 29 =
  34. 34.4 × 9 =
  35. 35.21 × 99 =
  36. 36.8 × 29 =
  37. 37.7 × 98 =
  38. 38.10 × 9 =
  39. 39.37 × 99 =
  40. 40.15 × 29 =

Answer key

  1. 245
  2. 72
  3. 99
  4. 45
  5. 147
  6. 126
  7. 114
  8. 2450
  9. 686
  10. 396
  11. 1862
  12. 114
  13. 343
  14. 135
  15. 81
  16. 45
  17. 539
  18. 3960
  19. 190
  20. 81
  21. 2058
  22. 209
  23. 54
  24. 539
  25. 203
  26. 247
  27. 261
  28. 891
  29. 2277
  30. 245
  31. 76
  32. 135
  33. 87
  34. 36
  35. 2079
  36. 232
  37. 686
  38. 90
  39. 3663
  40. 435

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