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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 944 · 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. 1.6 × 99 =
  2. 2.31 × 99 =
  3. 3.15 × 9 =
  4. 4.10 × 19 =
  5. 5.12 × 49 =
  6. 6.7 × 29 =
  7. 7.36 × 98 =
  8. 8.7 × 49 =
  9. 9.14 × 19 =
  10. 10.16 × 98 =
  11. 11.33 × 99 =
  12. 12.4 × 29 =
  13. 13.10 × 49 =
  14. 14.35 × 99 =
  15. 15.13 × 9 =
  16. 16.19 × 98 =
  17. 17.3 × 9 =
  18. 18.15 × 29 =
  19. 19.5 × 9 =
  20. 20.25 × 99 =
  21. 21.3 × 9 =
  22. 22.4 × 9 =
  23. 23.4 × 29 =
  24. 24.15 × 49 =
  25. 25.11 × 9 =
  26. 26.4 × 9 =
  27. 27.11 × 9 =
  28. 28.13 × 29 =
  29. 29.12 × 9 =
  30. 30.13 × 19 =
  31. 31.6 × 19 =
  32. 32.9 × 49 =
  33. 33.9 × 9 =
  34. 34.14 × 9 =
  35. 35.4 × 9 =
  36. 36.13 × 98 =
  37. 37.9 × 9 =
  38. 38.5 × 29 =
  39. 39.10 × 9 =
  40. 40.9 × 9 =

Answer key

  1. 594
  2. 3069
  3. 135
  4. 190
  5. 588
  6. 203
  7. 3528
  8. 343
  9. 266
  10. 1568
  11. 3267
  12. 116
  13. 490
  14. 3465
  15. 117
  16. 1862
  17. 27
  18. 435
  19. 45
  20. 2475
  21. 27
  22. 36
  23. 116
  24. 735
  25. 99
  26. 36
  27. 99
  28. 377
  29. 108
  30. 247
  31. 114
  32. 441
  33. 81
  34. 126
  35. 36
  36. 1274
  37. 81
  38. 145
  39. 90
  40. 81

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