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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 909 · 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 × 49 =
  2. 2.6 × 29 =
  3. 3.8 × 9 =
  4. 4.7 × 19 =
  5. 5.6 × 98 =
  6. 6.5 × 29 =
  7. 7.14 × 9 =
  8. 8.11 × 29 =
  9. 9.24 × 98 =
  10. 10.12 × 98 =
  11. 11.15 × 9 =
  12. 12.9 × 49 =
  13. 13.6 × 9 =
  14. 14.8 × 49 =
  15. 15.7 × 98 =
  16. 16.16 × 99 =
  17. 17.36 × 99 =
  18. 18.5 × 98 =
  19. 19.7 × 9 =
  20. 20.11 × 49 =
  21. 21.6 × 49 =
  22. 22.22 × 98 =
  23. 23.3 × 49 =
  24. 24.7 × 9 =
  25. 25.3 × 49 =
  26. 26.6 × 9 =
  27. 27.3 × 98 =
  28. 28.18 × 98 =
  29. 29.11 × 19 =
  30. 30.13 × 29 =
  31. 31.6 × 9 =
  32. 32.9 × 9 =
  33. 33.5 × 9 =
  34. 34.8 × 98 =
  35. 35.7 × 9 =
  36. 36.5 × 49 =
  37. 37.12 × 99 =
  38. 38.4 × 98 =
  39. 39.9 × 19 =
  40. 40.14 × 49 =

Answer key

  1. 735
  2. 174
  3. 72
  4. 133
  5. 588
  6. 145
  7. 126
  8. 319
  9. 2352
  10. 1176
  11. 135
  12. 441
  13. 54
  14. 392
  15. 686
  16. 1584
  17. 3564
  18. 490
  19. 63
  20. 539
  21. 294
  22. 2156
  23. 147
  24. 63
  25. 147
  26. 54
  27. 294
  28. 1764
  29. 209
  30. 377
  31. 54
  32. 81
  33. 45
  34. 784
  35. 63
  36. 245
  37. 1188
  38. 392
  39. 171
  40. 686

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