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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 177 · 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. 1.9 × 9 =
  2. 2.5 × 49 =
  3. 3.7 × 19 =
  4. 4.3 × 19 =
  5. 5.10 × 49 =
  6. 6.12 × 29 =
  7. 7.7 × 99 =
  8. 8.5 × 29 =
  9. 9.27 × 99 =
  10. 10.9 × 19 =
  11. 11.11 × 29 =
  12. 12.3 × 29 =
  13. 13.4 × 9 =
  14. 14.8 × 99 =
  15. 15.3 × 49 =
  16. 16.15 × 49 =
  17. 17.6 × 49 =
  18. 18.14 × 9 =
  19. 19.5 × 29 =
  20. 20.13 × 9 =
  21. 21.12 × 98 =
  22. 22.9 × 99 =
  23. 23.40 × 99 =
  24. 24.4 × 49 =
  25. 25.3 × 29 =
  26. 26.12 × 98 =
  27. 27.14 × 98 =
  28. 28.7 × 29 =
  29. 29.8 × 29 =
  30. 30.3 × 29 =
  31. 31.6 × 29 =
  32. 32.4 × 29 =
  33. 33.7 × 49 =
  34. 34.11 × 19 =
  35. 35.8 × 99 =
  36. 36.8 × 49 =
  37. 37.4 × 98 =
  38. 38.19 × 98 =
  39. 39.7 × 99 =
  40. 40.11 × 49 =

Answer key

  1. 81
  2. 245
  3. 133
  4. 57
  5. 490
  6. 348
  7. 693
  8. 145
  9. 2673
  10. 171
  11. 319
  12. 87
  13. 36
  14. 792
  15. 147
  16. 735
  17. 294
  18. 126
  19. 145
  20. 117
  21. 1176
  22. 891
  23. 3960
  24. 196
  25. 87
  26. 1176
  27. 1372
  28. 203
  29. 232
  30. 87
  31. 174
  32. 116
  33. 343
  34. 209
  35. 792
  36. 392
  37. 392
  38. 1862
  39. 693
  40. 539

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