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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 932 · 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 × 9 =
  2. 2.8 × 19 =
  3. 3.3 × 9 =
  4. 4.5 × 29 =
  5. 5.14 × 49 =
  6. 6.38 × 98 =
  7. 7.13 × 29 =
  8. 8.3 × 98 =
  9. 9.11 × 29 =
  10. 10.13 × 19 =
  11. 11.10 × 49 =
  12. 12.8 × 9 =
  13. 13.39 × 99 =
  14. 14.16 × 98 =
  15. 15.3 × 9 =
  16. 16.10 × 29 =
  17. 17.13 × 9 =
  18. 18.7 × 9 =
  19. 19.4 × 49 =
  20. 20.8 × 9 =
  21. 21.34 × 98 =
  22. 22.15 × 19 =
  23. 23.10 × 19 =
  24. 24.7 × 19 =
  25. 25.13 × 19 =
  26. 26.10 × 9 =
  27. 27.8 × 29 =
  28. 28.5 × 29 =
  29. 29.14 × 99 =
  30. 30.13 × 9 =
  31. 31.4 × 29 =
  32. 32.21 × 99 =
  33. 33.10 × 49 =
  34. 34.11 × 19 =
  35. 35.12 × 49 =
  36. 36.15 × 98 =
  37. 37.3 × 49 =
  38. 38.11 × 9 =
  39. 39.9 × 99 =
  40. 40.10 × 19 =

Answer key

  1. 108
  2. 152
  3. 27
  4. 145
  5. 686
  6. 3724
  7. 377
  8. 294
  9. 319
  10. 247
  11. 490
  12. 72
  13. 3861
  14. 1568
  15. 27
  16. 290
  17. 117
  18. 63
  19. 196
  20. 72
  21. 3332
  22. 285
  23. 190
  24. 133
  25. 247
  26. 90
  27. 232
  28. 145
  29. 1386
  30. 117
  31. 116
  32. 2079
  33. 490
  34. 209
  35. 588
  36. 1470
  37. 147
  38. 99
  39. 891
  40. 190

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