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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 848 · 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 × 49 =
  2. 2.12 × 9 =
  3. 3.9 × 19 =
  4. 4.7 × 29 =
  5. 5.27 × 98 =
  6. 6.6 × 19 =
  7. 7.15 × 49 =
  8. 8.9 × 9 =
  9. 9.8 × 9 =
  10. 10.40 × 99 =
  11. 11.3 × 29 =
  12. 12.15 × 49 =
  13. 13.7 × 49 =
  14. 14.17 × 99 =
  15. 15.3 × 19 =
  16. 16.9 × 9 =
  17. 17.30 × 98 =
  18. 18.7 × 9 =
  19. 19.15 × 29 =
  20. 20.14 × 29 =
  21. 21.12 × 9 =
  22. 22.14 × 9 =
  23. 23.29 × 98 =
  24. 24.11 × 19 =
  25. 25.8 × 9 =
  26. 26.4 × 9 =
  27. 27.8 × 29 =
  28. 28.22 × 98 =
  29. 29.3 × 19 =
  30. 30.6 × 98 =
  31. 31.6 × 9 =
  32. 32.7 × 19 =
  33. 33.11 × 49 =
  34. 34.13 × 98 =
  35. 35.12 × 29 =
  36. 36.12 × 19 =
  37. 37.13 × 29 =
  38. 38.5 × 99 =
  39. 39.34 × 99 =
  40. 40.15 × 9 =

Answer key

  1. 490
  2. 108
  3. 171
  4. 203
  5. 2646
  6. 114
  7. 735
  8. 81
  9. 72
  10. 3960
  11. 87
  12. 735
  13. 343
  14. 1683
  15. 57
  16. 81
  17. 2940
  18. 63
  19. 435
  20. 406
  21. 108
  22. 126
  23. 2842
  24. 209
  25. 72
  26. 36
  27. 232
  28. 2156
  29. 57
  30. 588
  31. 54
  32. 133
  33. 539
  34. 1274
  35. 348
  36. 228
  37. 377
  38. 495
  39. 3366
  40. 135

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