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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 945 · 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. 1.15 × 19 =
  2. 2.12 × 9 =
  3. 3.12 × 49 =
  4. 4.24 × 99 =
  5. 5.35 × 98 =
  6. 6.4 × 19 =
  7. 7.14 × 9 =
  8. 8.35 × 98 =
  9. 9.31 × 98 =
  10. 10.4 × 19 =
  11. 11.7 × 29 =
  12. 12.5 × 9 =
  13. 13.8 × 9 =
  14. 14.12 × 49 =
  15. 15.12 × 29 =
  16. 16.20 × 98 =
  17. 17.5 × 49 =
  18. 18.15 × 49 =
  19. 19.8 × 9 =
  20. 20.27 × 98 =
  21. 21.10 × 9 =
  22. 22.7 × 19 =
  23. 23.15 × 98 =
  24. 24.13 × 99 =
  25. 25.12 × 9 =
  26. 26.5 × 49 =
  27. 27.5 × 9 =
  28. 28.4 × 9 =
  29. 29.4 × 29 =
  30. 30.11 × 19 =
  31. 31.7 × 49 =
  32. 32.5 × 49 =
  33. 33.6 × 29 =
  34. 34.21 × 98 =
  35. 35.9 × 29 =
  36. 36.34 × 98 =
  37. 37.15 × 19 =
  38. 38.14 × 9 =
  39. 39.4 × 19 =
  40. 40.9 × 98 =

Answer key

  1. 285
  2. 108
  3. 588
  4. 2376
  5. 3430
  6. 76
  7. 126
  8. 3430
  9. 3038
  10. 76
  11. 203
  12. 45
  13. 72
  14. 588
  15. 348
  16. 1960
  17. 245
  18. 735
  19. 72
  20. 2646
  21. 90
  22. 133
  23. 1470
  24. 1287
  25. 108
  26. 245
  27. 45
  28. 36
  29. 116
  30. 209
  31. 343
  32. 245
  33. 174
  34. 2058
  35. 261
  36. 3332
  37. 285
  38. 126
  39. 76
  40. 882

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