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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 692 · 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. 1.40 × 98 =
  2. 2.23 × 98 =
  3. 3.10 × 19 =
  4. 4.15 × 49 =
  5. 5.5 × 19 =
  6. 6.3 × 9 =
  7. 7.34 × 99 =
  8. 8.9 × 9 =
  9. 9.14 × 9 =
  10. 10.11 × 49 =
  11. 11.32 × 99 =
  12. 12.36 × 99 =
  13. 13.5 × 29 =
  14. 14.10 × 19 =
  15. 15.12 × 9 =
  16. 16.12 × 49 =
  17. 17.3 × 49 =
  18. 18.13 × 29 =
  19. 19.10 × 9 =
  20. 20.8 × 49 =
  21. 21.15 × 19 =
  22. 22.12 × 29 =
  23. 23.6 × 29 =
  24. 24.9 × 29 =
  25. 25.5 × 19 =
  26. 26.12 × 19 =
  27. 27.33 × 98 =
  28. 28.40 × 98 =
  29. 29.5 × 49 =
  30. 30.12 × 98 =
  31. 31.35 × 99 =
  32. 32.4 × 49 =
  33. 33.5 × 9 =
  34. 34.9 × 99 =
  35. 35.10 × 29 =
  36. 36.15 × 49 =
  37. 37.10 × 49 =
  38. 38.5 × 9 =
  39. 39.5 × 9 =
  40. 40.7 × 9 =

Answer key

  1. 3920
  2. 2254
  3. 190
  4. 735
  5. 95
  6. 27
  7. 3366
  8. 81
  9. 126
  10. 539
  11. 3168
  12. 3564
  13. 145
  14. 190
  15. 108
  16. 588
  17. 147
  18. 377
  19. 90
  20. 392
  21. 285
  22. 348
  23. 174
  24. 261
  25. 95
  26. 228
  27. 3234
  28. 3920
  29. 245
  30. 1176
  31. 3465
  32. 196
  33. 45
  34. 891
  35. 290
  36. 735
  37. 490
  38. 45
  39. 45
  40. 63

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