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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 882 · 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. 1.4 × 49 =
  2. 2.8 × 9 =
  3. 3.19 × 98 =
  4. 4.15 × 19 =
  5. 5.17 × 99 =
  6. 6.4 × 29 =
  7. 7.32 × 98 =
  8. 8.6 × 19 =
  9. 9.15 × 29 =
  10. 10.17 × 98 =
  11. 11.5 × 9 =
  12. 12.7 × 49 =
  13. 13.5 × 98 =
  14. 14.12 × 29 =
  15. 15.11 × 49 =
  16. 16.5 × 29 =
  17. 17.7 × 9 =
  18. 18.11 × 98 =
  19. 19.21 × 98 =
  20. 20.36 × 99 =
  21. 21.16 × 99 =
  22. 22.37 × 99 =
  23. 23.13 × 19 =
  24. 24.11 × 49 =
  25. 25.35 × 98 =
  26. 26.8 × 49 =
  27. 27.37 × 98 =
  28. 28.4 × 29 =
  29. 29.8 × 29 =
  30. 30.13 × 9 =
  31. 31.10 × 29 =
  32. 32.11 × 9 =
  33. 33.4 × 49 =
  34. 34.14 × 99 =
  35. 35.3 × 19 =
  36. 36.21 × 98 =
  37. 37.11 × 29 =
  38. 38.5 × 29 =
  39. 39.7 × 19 =
  40. 40.11 × 29 =

Answer key

  1. 196
  2. 72
  3. 1862
  4. 285
  5. 1683
  6. 116
  7. 3136
  8. 114
  9. 435
  10. 1666
  11. 45
  12. 343
  13. 490
  14. 348
  15. 539
  16. 145
  17. 63
  18. 1078
  19. 2058
  20. 3564
  21. 1584
  22. 3663
  23. 247
  24. 539
  25. 3430
  26. 392
  27. 3626
  28. 116
  29. 232
  30. 117
  31. 290
  32. 99
  33. 196
  34. 1386
  35. 57
  36. 2058
  37. 319
  38. 145
  39. 133
  40. 319

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