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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 901 · 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. 1.12 × 49 =
  2. 2.13 × 29 =
  3. 3.15 × 49 =
  4. 4.3 × 9 =
  5. 5.11 × 9 =
  6. 6.12 × 9 =
  7. 7.7 × 98 =
  8. 8.22 × 98 =
  9. 9.7 × 49 =
  10. 10.6 × 29 =
  11. 11.8 × 99 =
  12. 12.11 × 49 =
  13. 13.10 × 19 =
  14. 14.3 × 9 =
  15. 15.21 × 98 =
  16. 16.15 × 49 =
  17. 17.4 × 49 =
  18. 18.39 × 98 =
  19. 19.27 × 98 =
  20. 20.21 × 99 =
  21. 21.10 × 29 =
  22. 22.14 × 99 =
  23. 23.10 × 9 =
  24. 24.9 × 99 =
  25. 25.8 × 29 =
  26. 26.39 × 99 =
  27. 27.6 × 49 =
  28. 28.8 × 9 =
  29. 29.19 × 99 =
  30. 30.15 × 19 =
  31. 31.34 × 98 =
  32. 32.15 × 49 =
  33. 33.40 × 99 =
  34. 34.4 × 9 =
  35. 35.11 × 9 =
  36. 36.10 × 29 =
  37. 37.23 × 99 =
  38. 38.14 × 19 =
  39. 39.12 × 99 =
  40. 40.12 × 99 =

Answer key

  1. 588
  2. 377
  3. 735
  4. 27
  5. 99
  6. 108
  7. 686
  8. 2156
  9. 343
  10. 174
  11. 792
  12. 539
  13. 190
  14. 27
  15. 2058
  16. 735
  17. 196
  18. 3822
  19. 2646
  20. 2079
  21. 290
  22. 1386
  23. 90
  24. 891
  25. 232
  26. 3861
  27. 294
  28. 72
  29. 1881
  30. 285
  31. 3332
  32. 735
  33. 3960
  34. 36
  35. 99
  36. 290
  37. 2277
  38. 266
  39. 1188
  40. 1188

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