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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 853 · 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 × 19 =
  2. 2.8 × 99 =
  3. 3.5 × 99 =
  4. 4.15 × 98 =
  5. 5.7 × 19 =
  6. 6.4 × 49 =
  7. 7.12 × 19 =
  8. 8.13 × 9 =
  9. 9.12 × 9 =
  10. 10.15 × 49 =
  11. 11.8 × 9 =
  12. 12.10 × 29 =
  13. 13.8 × 19 =
  14. 14.25 × 99 =
  15. 15.39 × 99 =
  16. 16.15 × 19 =
  17. 17.31 × 99 =
  18. 18.15 × 19 =
  19. 19.3 × 99 =
  20. 20.31 × 98 =
  21. 21.26 × 98 =
  22. 22.8 × 19 =
  23. 23.9 × 9 =
  24. 24.8 × 49 =
  25. 25.8 × 9 =
  26. 26.12 × 99 =
  27. 27.5 × 29 =
  28. 28.4 × 49 =
  29. 29.15 × 29 =
  30. 30.3 × 29 =
  31. 31.12 × 9 =
  32. 32.12 × 29 =
  33. 33.5 × 49 =
  34. 34.31 × 98 =
  35. 35.13 × 9 =
  36. 36.6 × 19 =
  37. 37.3 × 9 =
  38. 38.11 × 49 =
  39. 39.6 × 19 =
  40. 40.11 × 49 =

Answer key

  1. 133
  2. 792
  3. 495
  4. 1470
  5. 133
  6. 196
  7. 228
  8. 117
  9. 108
  10. 735
  11. 72
  12. 290
  13. 152
  14. 2475
  15. 3861
  16. 285
  17. 3069
  18. 285
  19. 297
  20. 3038
  21. 2548
  22. 152
  23. 81
  24. 392
  25. 72
  26. 1188
  27. 145
  28. 196
  29. 435
  30. 87
  31. 108
  32. 348
  33. 245
  34. 3038
  35. 117
  36. 114
  37. 27
  38. 539
  39. 114
  40. 539

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