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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 996 · 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. 2.6 × 19 =
  3. 3.8 × 29 =
  4. 4.11 × 49 =
  5. 5.20 × 99 =
  6. 6.4 × 9 =
  7. 7.9 × 99 =
  8. 8.7 × 49 =
  9. 9.4 × 29 =
  10. 10.7 × 9 =
  11. 11.15 × 9 =
  12. 12.6 × 9 =
  13. 13.14 × 29 =
  14. 14.9 × 29 =
  15. 15.7 × 9 =
  16. 16.12 × 99 =
  17. 17.16 × 98 =
  18. 18.25 × 99 =
  19. 19.6 × 99 =
  20. 20.8 × 49 =
  21. 21.14 × 19 =
  22. 22.12 × 9 =
  23. 23.23 × 99 =
  24. 24.15 × 29 =
  25. 25.15 × 99 =
  26. 26.3 × 49 =
  27. 27.8 × 19 =
  28. 28.39 × 99 =
  29. 29.9 × 9 =
  30. 30.5 × 29 =
  31. 31.23 × 99 =
  32. 32.11 × 19 =
  33. 33.30 × 98 =
  34. 34.39 × 99 =
  35. 35.12 × 29 =
  36. 36.11 × 99 =
  37. 37.5 × 98 =
  38. 38.9 × 98 =
  39. 39.13 × 98 =
  40. 40.4 × 9 =

Answer key

  1. 90
  2. 114
  3. 232
  4. 539
  5. 1980
  6. 36
  7. 891
  8. 343
  9. 116
  10. 63
  11. 135
  12. 54
  13. 406
  14. 261
  15. 63
  16. 1188
  17. 1568
  18. 2475
  19. 594
  20. 392
  21. 266
  22. 108
  23. 2277
  24. 435
  25. 1485
  26. 147
  27. 152
  28. 3861
  29. 81
  30. 145
  31. 2277
  32. 209
  33. 2940
  34. 3861
  35. 348
  36. 1089
  37. 490
  38. 882
  39. 1274
  40. 36

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