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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 834 · 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 × 9 =
  2. 2.31 × 98 =
  3. 3.8 × 98 =
  4. 4.13 × 19 =
  5. 5.12 × 19 =
  6. 6.8 × 29 =
  7. 7.13 × 9 =
  8. 8.31 × 99 =
  9. 9.8 × 29 =
  10. 10.5 × 19 =
  11. 11.37 × 98 =
  12. 12.7 × 29 =
  13. 13.6 × 49 =
  14. 14.11 × 19 =
  15. 15.9 × 49 =
  16. 16.7 × 9 =
  17. 17.11 × 49 =
  18. 18.3 × 9 =
  19. 19.18 × 99 =
  20. 20.5 × 49 =
  21. 21.3 × 9 =
  22. 22.8 × 9 =
  23. 23.12 × 99 =
  24. 24.13 × 9 =
  25. 25.9 × 98 =
  26. 26.5 × 19 =
  27. 27.7 × 9 =
  28. 28.28 × 99 =
  29. 29.27 × 99 =
  30. 30.11 × 29 =
  31. 31.25 × 98 =
  32. 32.5 × 29 =
  33. 33.4 × 98 =
  34. 34.37 × 99 =
  35. 35.7 × 19 =
  36. 36.3 × 19 =
  37. 37.8 × 49 =
  38. 38.11 × 49 =
  39. 39.11 × 98 =
  40. 40.10 × 9 =

Answer key

  1. 135
  2. 3038
  3. 784
  4. 247
  5. 228
  6. 232
  7. 117
  8. 3069
  9. 232
  10. 95
  11. 3626
  12. 203
  13. 294
  14. 209
  15. 441
  16. 63
  17. 539
  18. 27
  19. 1782
  20. 245
  21. 27
  22. 72
  23. 1188
  24. 117
  25. 882
  26. 95
  27. 63
  28. 2772
  29. 2673
  30. 319
  31. 2450
  32. 145
  33. 392
  34. 3663
  35. 133
  36. 57
  37. 392
  38. 539
  39. 1078
  40. 90

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