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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 854 · 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. 1.7 × 9 =
  2. 2.7 × 99 =
  3. 3.30 × 99 =
  4. 4.9 × 49 =
  5. 5.13 × 9 =
  6. 6.23 × 99 =
  7. 7.12 × 19 =
  8. 8.4 × 29 =
  9. 9.39 × 98 =
  10. 10.24 × 98 =
  11. 11.13 × 98 =
  12. 12.34 × 98 =
  13. 13.3 × 49 =
  14. 14.24 × 99 =
  15. 15.8 × 49 =
  16. 16.23 × 98 =
  17. 17.13 × 49 =
  18. 18.32 × 99 =
  19. 19.23 × 99 =
  20. 20.10 × 19 =
  21. 21.5 × 19 =
  22. 22.12 × 19 =
  23. 23.12 × 19 =
  24. 24.15 × 29 =
  25. 25.19 × 99 =
  26. 26.4 × 29 =
  27. 27.13 × 9 =
  28. 28.4 × 99 =
  29. 29.11 × 9 =
  30. 30.35 × 98 =
  31. 31.15 × 29 =
  32. 32.4 × 19 =
  33. 33.15 × 29 =
  34. 34.20 × 99 =
  35. 35.12 × 9 =
  36. 36.15 × 49 =
  37. 37.15 × 19 =
  38. 38.23 × 99 =
  39. 39.26 × 99 =
  40. 40.12 × 9 =

Answer key

  1. 63
  2. 693
  3. 2970
  4. 441
  5. 117
  6. 2277
  7. 228
  8. 116
  9. 3822
  10. 2352
  11. 1274
  12. 3332
  13. 147
  14. 2376
  15. 392
  16. 2254
  17. 637
  18. 3168
  19. 2277
  20. 190
  21. 95
  22. 228
  23. 228
  24. 435
  25. 1881
  26. 116
  27. 117
  28. 396
  29. 99
  30. 3430
  31. 435
  32. 76
  33. 435
  34. 1980
  35. 108
  36. 735
  37. 285
  38. 2277
  39. 2574
  40. 108

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