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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 545 · 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. 1.8 × 9 =
  2. 2.9 × 99 =
  3. 3.6 × 9 =
  4. 4.23 × 98 =
  5. 5.24 × 98 =
  6. 6.9 × 19 =
  7. 7.34 × 98 =
  8. 8.6 × 49 =
  9. 9.20 × 99 =
  10. 10.15 × 29 =
  11. 11.3 × 9 =
  12. 12.15 × 19 =
  13. 13.10 × 29 =
  14. 14.4 × 29 =
  15. 15.4 × 9 =
  16. 16.19 × 99 =
  17. 17.7 × 19 =
  18. 18.5 × 99 =
  19. 19.4 × 99 =
  20. 20.12 × 9 =
  21. 21.27 × 99 =
  22. 22.15 × 19 =
  23. 23.8 × 49 =
  24. 24.9 × 99 =
  25. 25.5 × 49 =
  26. 26.12 × 19 =
  27. 27.19 × 98 =
  28. 28.24 × 99 =
  29. 29.4 × 49 =
  30. 30.6 × 29 =
  31. 31.3 × 98 =
  32. 32.8 × 49 =
  33. 33.12 × 19 =
  34. 34.6 × 19 =
  35. 35.18 × 99 =
  36. 36.3 × 9 =
  37. 37.27 × 99 =
  38. 38.7 × 9 =
  39. 39.10 × 49 =
  40. 40.23 × 98 =

Answer key

  1. 72
  2. 891
  3. 54
  4. 2254
  5. 2352
  6. 171
  7. 3332
  8. 294
  9. 1980
  10. 435
  11. 27
  12. 285
  13. 290
  14. 116
  15. 36
  16. 1881
  17. 133
  18. 495
  19. 396
  20. 108
  21. 2673
  22. 285
  23. 392
  24. 891
  25. 245
  26. 228
  27. 1862
  28. 2376
  29. 196
  30. 174
  31. 294
  32. 392
  33. 228
  34. 114
  35. 1782
  36. 27
  37. 2673
  38. 63
  39. 490
  40. 2254

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