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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 291 · 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. 1.21 × 98 =
  2. 2.11 × 49 =
  3. 3.15 × 19 =
  4. 4.5 × 19 =
  5. 5.17 × 98 =
  6. 6.5 × 29 =
  7. 7.4 × 19 =
  8. 8.9 × 49 =
  9. 9.13 × 29 =
  10. 10.12 × 99 =
  11. 11.3 × 29 =
  12. 12.4 × 29 =
  13. 13.8 × 19 =
  14. 14.4 × 9 =
  15. 15.34 × 99 =
  16. 16.12 × 9 =
  17. 17.10 × 99 =
  18. 18.4 × 19 =
  19. 19.6 × 19 =
  20. 20.21 × 98 =
  21. 21.6 × 49 =
  22. 22.21 × 98 =
  23. 23.5 × 99 =
  24. 24.13 × 49 =
  25. 25.22 × 99 =
  26. 26.20 × 99 =
  27. 27.9 × 49 =
  28. 28.30 × 98 =
  29. 29.9 × 9 =
  30. 30.15 × 99 =
  31. 31.4 × 9 =
  32. 32.4 × 29 =
  33. 33.4 × 99 =
  34. 34.10 × 29 =
  35. 35.3 × 99 =
  36. 36.9 × 19 =
  37. 37.29 × 98 =
  38. 38.15 × 19 =
  39. 39.8 × 99 =
  40. 40.25 × 98 =

Answer key

  1. 2058
  2. 539
  3. 285
  4. 95
  5. 1666
  6. 145
  7. 76
  8. 441
  9. 377
  10. 1188
  11. 87
  12. 116
  13. 152
  14. 36
  15. 3366
  16. 108
  17. 990
  18. 76
  19. 114
  20. 2058
  21. 294
  22. 2058
  23. 495
  24. 637
  25. 2178
  26. 1980
  27. 441
  28. 2940
  29. 81
  30. 1485
  31. 36
  32. 116
  33. 396
  34. 290
  35. 297
  36. 171
  37. 2842
  38. 285
  39. 792
  40. 2450

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