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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 252 · 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. 1.7 × 49 =
  2. 2.25 × 98 =
  3. 3.9 × 9 =
  4. 4.13 × 29 =
  5. 5.19 × 99 =
  6. 6.12 × 49 =
  7. 7.6 × 49 =
  8. 8.11 × 9 =
  9. 9.22 × 98 =
  10. 10.13 × 19 =
  11. 11.9 × 19 =
  12. 12.3 × 9 =
  13. 13.8 × 19 =
  14. 14.27 × 99 =
  15. 15.40 × 99 =
  16. 16.7 × 29 =
  17. 17.3 × 98 =
  18. 18.15 × 99 =
  19. 19.5 × 9 =
  20. 20.5 × 19 =
  21. 21.6 × 49 =
  22. 22.13 × 9 =
  23. 23.14 × 9 =
  24. 24.14 × 49 =
  25. 25.17 × 99 =
  26. 26.5 × 9 =
  27. 27.3 × 9 =
  28. 28.6 × 19 =
  29. 29.5 × 9 =
  30. 30.35 × 99 =
  31. 31.24 × 98 =
  32. 32.12 × 19 =
  33. 33.37 × 98 =
  34. 34.11 × 19 =
  35. 35.15 × 29 =
  36. 36.37 × 99 =
  37. 37.10 × 19 =
  38. 38.11 × 19 =
  39. 39.27 × 99 =
  40. 40.15 × 49 =

Answer key

  1. 343
  2. 2450
  3. 81
  4. 377
  5. 1881
  6. 588
  7. 294
  8. 99
  9. 2156
  10. 247
  11. 171
  12. 27
  13. 152
  14. 2673
  15. 3960
  16. 203
  17. 294
  18. 1485
  19. 45
  20. 95
  21. 294
  22. 117
  23. 126
  24. 686
  25. 1683
  26. 45
  27. 27
  28. 114
  29. 45
  30. 3465
  31. 2352
  32. 228
  33. 3626
  34. 209
  35. 435
  36. 3663
  37. 190
  38. 209
  39. 2673
  40. 735

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