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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 992 · 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 × 9 =
  2. 2.15 × 49 =
  3. 3.5 × 29 =
  4. 4.8 × 9 =
  5. 5.9 × 49 =
  6. 6.4 × 49 =
  7. 7.12 × 19 =
  8. 8.10 × 99 =
  9. 9.11 × 98 =
  10. 10.8 × 49 =
  11. 11.7 × 19 =
  12. 12.4 × 29 =
  13. 13.7 × 49 =
  14. 14.4 × 9 =
  15. 15.3 × 29 =
  16. 16.15 × 29 =
  17. 17.5 × 29 =
  18. 18.19 × 99 =
  19. 19.4 × 9 =
  20. 20.4 × 19 =
  21. 21.21 × 98 =
  22. 22.3 × 29 =
  23. 23.7 × 19 =
  24. 24.4 × 29 =
  25. 25.15 × 49 =
  26. 26.27 × 98 =
  27. 27.8 × 49 =
  28. 28.37 × 98 =
  29. 29.4 × 9 =
  30. 30.14 × 49 =
  31. 31.3 × 19 =
  32. 32.6 × 19 =
  33. 33.10 × 9 =
  34. 34.5 × 29 =
  35. 35.3 × 9 =
  36. 36.40 × 99 =
  37. 37.14 × 49 =
  38. 38.6 × 29 =
  39. 39.3 × 29 =
  40. 40.4 × 99 =

Answer key

  1. 135
  2. 735
  3. 145
  4. 72
  5. 441
  6. 196
  7. 228
  8. 990
  9. 1078
  10. 392
  11. 133
  12. 116
  13. 343
  14. 36
  15. 87
  16. 435
  17. 145
  18. 1881
  19. 36
  20. 76
  21. 2058
  22. 87
  23. 133
  24. 116
  25. 735
  26. 2646
  27. 392
  28. 3626
  29. 36
  30. 686
  31. 57
  32. 114
  33. 90
  34. 145
  35. 27
  36. 3960
  37. 686
  38. 174
  39. 87
  40. 396

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