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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 941 · 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 × 9 =
  2. 2.7 × 98 =
  3. 3.4 × 19 =
  4. 4.5 × 9 =
  5. 5.14 × 29 =
  6. 6.4 × 19 =
  7. 7.6 × 49 =
  8. 8.8 × 19 =
  9. 9.4 × 19 =
  10. 10.11 × 19 =
  11. 11.7 × 49 =
  12. 12.3 × 29 =
  13. 13.9 × 29 =
  14. 14.36 × 98 =
  15. 15.11 × 19 =
  16. 16.28 × 98 =
  17. 17.15 × 19 =
  18. 18.15 × 49 =
  19. 19.14 × 19 =
  20. 20.6 × 19 =
  21. 21.11 × 29 =
  22. 22.5 × 9 =
  23. 23.10 × 49 =
  24. 24.11 × 19 =
  25. 25.6 × 29 =
  26. 26.12 × 9 =
  27. 27.10 × 19 =
  28. 28.5 × 9 =
  29. 29.31 × 98 =
  30. 30.5 × 29 =
  31. 31.36 × 99 =
  32. 32.11 × 49 =
  33. 33.10 × 19 =
  34. 34.11 × 19 =
  35. 35.11 × 49 =
  36. 36.12 × 19 =
  37. 37.9 × 9 =
  38. 38.5 × 19 =
  39. 39.4 × 29 =
  40. 40.4 × 99 =

Answer key

  1. 90
  2. 686
  3. 76
  4. 45
  5. 406
  6. 76
  7. 294
  8. 152
  9. 76
  10. 209
  11. 343
  12. 87
  13. 261
  14. 3528
  15. 209
  16. 2744
  17. 285
  18. 735
  19. 266
  20. 114
  21. 319
  22. 45
  23. 490
  24. 209
  25. 174
  26. 108
  27. 190
  28. 45
  29. 3038
  30. 145
  31. 3564
  32. 539
  33. 190
  34. 209
  35. 539
  36. 228
  37. 81
  38. 95
  39. 116
  40. 396

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