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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 634 · 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. 1.6 × 19 =
  2. 2.5 × 29 =
  3. 3.10 × 49 =
  4. 4.32 × 98 =
  5. 5.5 × 19 =
  6. 6.8 × 49 =
  7. 7.5 × 9 =
  8. 8.6 × 9 =
  9. 9.10 × 99 =
  10. 10.4 × 98 =
  11. 11.6 × 49 =
  12. 12.11 × 29 =
  13. 13.15 × 19 =
  14. 14.19 × 98 =
  15. 15.15 × 49 =
  16. 16.11 × 98 =
  17. 17.15 × 29 =
  18. 18.25 × 99 =
  19. 19.12 × 9 =
  20. 20.9 × 29 =
  21. 21.13 × 49 =
  22. 22.5 × 9 =
  23. 23.14 × 19 =
  24. 24.34 × 98 =
  25. 25.11 × 9 =
  26. 26.11 × 19 =
  27. 27.27 × 99 =
  28. 28.8 × 9 =
  29. 29.15 × 29 =
  30. 30.8 × 49 =
  31. 31.12 × 9 =
  32. 32.6 × 9 =
  33. 33.40 × 98 =
  34. 34.11 × 9 =
  35. 35.13 × 9 =
  36. 36.5 × 9 =
  37. 37.11 × 9 =
  38. 38.8 × 49 =
  39. 39.29 × 99 =
  40. 40.25 × 99 =

Answer key

  1. 114
  2. 145
  3. 490
  4. 3136
  5. 95
  6. 392
  7. 45
  8. 54
  9. 990
  10. 392
  11. 294
  12. 319
  13. 285
  14. 1862
  15. 735
  16. 1078
  17. 435
  18. 2475
  19. 108
  20. 261
  21. 637
  22. 45
  23. 266
  24. 3332
  25. 99
  26. 209
  27. 2673
  28. 72
  29. 435
  30. 392
  31. 108
  32. 54
  33. 3920
  34. 99
  35. 117
  36. 45
  37. 99
  38. 392
  39. 2871
  40. 2475

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