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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 956 · 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. 1.10 × 19 =
  2. 2.10 × 19 =
  3. 3.20 × 98 =
  4. 4.4 × 98 =
  5. 5.35 × 98 =
  6. 6.4 × 29 =
  7. 7.12 × 49 =
  8. 8.3 × 49 =
  9. 9.10 × 99 =
  10. 10.23 × 98 =
  11. 11.13 × 19 =
  12. 12.6 × 9 =
  13. 13.5 × 9 =
  14. 14.27 × 98 =
  15. 15.26 × 98 =
  16. 16.9 × 9 =
  17. 17.13 × 19 =
  18. 18.5 × 9 =
  19. 19.33 × 98 =
  20. 20.13 × 98 =
  21. 21.12 × 19 =
  22. 22.3 × 29 =
  23. 23.5 × 49 =
  24. 24.3 × 49 =
  25. 25.13 × 49 =
  26. 26.10 × 9 =
  27. 27.12 × 9 =
  28. 28.10 × 19 =
  29. 29.3 × 19 =
  30. 30.13 × 99 =
  31. 31.8 × 98 =
  32. 32.11 × 19 =
  33. 33.10 × 29 =
  34. 34.4 × 19 =
  35. 35.13 × 49 =
  36. 36.10 × 49 =
  37. 37.11 × 49 =
  38. 38.15 × 49 =
  39. 39.8 × 9 =
  40. 40.15 × 49 =

Answer key

  1. 190
  2. 190
  3. 1960
  4. 392
  5. 3430
  6. 116
  7. 588
  8. 147
  9. 990
  10. 2254
  11. 247
  12. 54
  13. 45
  14. 2646
  15. 2548
  16. 81
  17. 247
  18. 45
  19. 3234
  20. 1274
  21. 228
  22. 87
  23. 245
  24. 147
  25. 637
  26. 90
  27. 108
  28. 190
  29. 57
  30. 1287
  31. 784
  32. 209
  33. 290
  34. 76
  35. 637
  36. 490
  37. 539
  38. 735
  39. 72
  40. 735

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