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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 966 · 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. 1.4 × 98 =
  2. 2.6 × 19 =
  3. 3.9 × 9 =
  4. 4.5 × 29 =
  5. 5.4 × 9 =
  6. 6.3 × 19 =
  7. 7.5 × 99 =
  8. 8.14 × 29 =
  9. 9.9 × 49 =
  10. 10.8 × 9 =
  11. 11.5 × 9 =
  12. 12.6 × 9 =
  13. 13.7 × 49 =
  14. 14.14 × 49 =
  15. 15.35 × 99 =
  16. 16.7 × 98 =
  17. 17.4 × 49 =
  18. 18.19 × 99 =
  19. 19.20 × 98 =
  20. 20.3 × 19 =
  21. 21.10 × 19 =
  22. 22.11 × 49 =
  23. 23.3 × 9 =
  24. 24.7 × 99 =
  25. 25.24 × 98 =
  26. 26.15 × 19 =
  27. 27.7 × 9 =
  28. 28.3 × 98 =
  29. 29.9 × 19 =
  30. 30.5 × 29 =
  31. 31.5 × 19 =
  32. 32.5 × 19 =
  33. 33.8 × 19 =
  34. 34.5 × 19 =
  35. 35.11 × 19 =
  36. 36.7 × 9 =
  37. 37.4 × 49 =
  38. 38.6 × 9 =
  39. 39.6 × 29 =
  40. 40.15 × 29 =

Answer key

  1. 392
  2. 114
  3. 81
  4. 145
  5. 36
  6. 57
  7. 495
  8. 406
  9. 441
  10. 72
  11. 45
  12. 54
  13. 343
  14. 686
  15. 3465
  16. 686
  17. 196
  18. 1881
  19. 1960
  20. 57
  21. 190
  22. 539
  23. 27
  24. 693
  25. 2352
  26. 285
  27. 63
  28. 294
  29. 171
  30. 145
  31. 95
  32. 95
  33. 152
  34. 95
  35. 209
  36. 63
  37. 196
  38. 54
  39. 174
  40. 435

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