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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 961 · 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. 2.9 × 19 =
  3. 3.10 × 29 =
  4. 4.3 × 19 =
  5. 5.8 × 98 =
  6. 6.14 × 9 =
  7. 7.6 × 99 =
  8. 8.5 × 29 =
  9. 9.5 × 29 =
  10. 10.3 × 29 =
  11. 11.4 × 9 =
  12. 12.4 × 19 =
  13. 13.6 × 49 =
  14. 14.13 × 99 =
  15. 15.5 × 9 =
  16. 16.10 × 9 =
  17. 17.4 × 49 =
  18. 18.4 × 99 =
  19. 19.32 × 99 =
  20. 20.6 × 49 =
  21. 21.12 × 9 =
  22. 22.10 × 9 =
  23. 23.13 × 49 =
  24. 24.15 × 99 =
  25. 25.11 × 29 =
  26. 26.6 × 29 =
  27. 27.10 × 29 =
  28. 28.9 × 99 =
  29. 29.4 × 9 =
  30. 30.24 × 99 =
  31. 31.13 × 9 =
  32. 32.6 × 9 =
  33. 33.19 × 99 =
  34. 34.7 × 9 =
  35. 35.10 × 98 =
  36. 36.9 × 19 =
  37. 37.33 × 98 =
  38. 38.4 × 29 =
  39. 39.23 × 99 =
  40. 40.14 × 29 =

Answer key

  1. 285
  2. 171
  3. 290
  4. 57
  5. 784
  6. 126
  7. 594
  8. 145
  9. 145
  10. 87
  11. 36
  12. 76
  13. 294
  14. 1287
  15. 45
  16. 90
  17. 196
  18. 396
  19. 3168
  20. 294
  21. 108
  22. 90
  23. 637
  24. 1485
  25. 319
  26. 174
  27. 290
  28. 891
  29. 36
  30. 2376
  31. 117
  32. 54
  33. 1881
  34. 63
  35. 980
  36. 171
  37. 3234
  38. 116
  39. 2277
  40. 406

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