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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 300 · 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. 1.22 × 98 =
  2. 2.3 × 9 =
  3. 3.10 × 99 =
  4. 4.4 × 9 =
  5. 5.3 × 98 =
  6. 6.11 × 99 =
  7. 7.3 × 49 =
  8. 8.9 × 29 =
  9. 9.32 × 98 =
  10. 10.7 × 9 =
  11. 11.8 × 99 =
  12. 12.6 × 9 =
  13. 13.11 × 29 =
  14. 14.24 × 98 =
  15. 15.11 × 49 =
  16. 16.22 × 99 =
  17. 17.8 × 29 =
  18. 18.36 × 99 =
  19. 19.11 × 49 =
  20. 20.9 × 49 =
  21. 21.11 × 49 =
  22. 22.4 × 49 =
  23. 23.10 × 29 =
  24. 24.28 × 99 =
  25. 25.14 × 19 =
  26. 26.11 × 29 =
  27. 27.11 × 98 =
  28. 28.8 × 19 =
  29. 29.10 × 29 =
  30. 30.22 × 98 =
  31. 31.17 × 98 =
  32. 32.27 × 98 =
  33. 33.8 × 9 =
  34. 34.15 × 9 =
  35. 35.6 × 19 =
  36. 36.6 × 49 =
  37. 37.36 × 98 =
  38. 38.11 × 19 =
  39. 39.6 × 9 =
  40. 40.4 × 99 =

Answer key

  1. 2156
  2. 27
  3. 990
  4. 36
  5. 294
  6. 1089
  7. 147
  8. 261
  9. 3136
  10. 63
  11. 792
  12. 54
  13. 319
  14. 2352
  15. 539
  16. 2178
  17. 232
  18. 3564
  19. 539
  20. 441
  21. 539
  22. 196
  23. 290
  24. 2772
  25. 266
  26. 319
  27. 1078
  28. 152
  29. 290
  30. 2156
  31. 1666
  32. 2646
  33. 72
  34. 135
  35. 114
  36. 294
  37. 3528
  38. 209
  39. 54
  40. 396

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