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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 880 · 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 × 99 =
  2. 2.19 × 99 =
  3. 3.7 × 99 =
  4. 4.14 × 49 =
  5. 5.7 × 49 =
  6. 6.3 × 99 =
  7. 7.36 × 99 =
  8. 8.6 × 9 =
  9. 9.9 × 99 =
  10. 10.8 × 49 =
  11. 11.12 × 49 =
  12. 12.11 × 99 =
  13. 13.5 × 9 =
  14. 14.7 × 9 =
  15. 15.6 × 19 =
  16. 16.17 × 98 =
  17. 17.6 × 9 =
  18. 18.17 × 99 =
  19. 19.11 × 29 =
  20. 20.4 × 9 =
  21. 21.7 × 29 =
  22. 22.5 × 19 =
  23. 23.5 × 9 =
  24. 24.13 × 98 =
  25. 25.29 × 98 =
  26. 26.10 × 19 =
  27. 27.4 × 9 =
  28. 28.8 × 29 =
  29. 29.9 × 49 =
  30. 30.14 × 98 =
  31. 31.25 × 99 =
  32. 32.17 × 99 =
  33. 33.3 × 19 =
  34. 34.23 × 98 =
  35. 35.10 × 19 =
  36. 36.17 × 99 =
  37. 37.3 × 19 =
  38. 38.6 × 19 =
  39. 39.4 × 49 =
  40. 40.9 × 19 =

Answer key

  1. 396
  2. 1881
  3. 693
  4. 686
  5. 343
  6. 297
  7. 3564
  8. 54
  9. 891
  10. 392
  11. 588
  12. 1089
  13. 45
  14. 63
  15. 114
  16. 1666
  17. 54
  18. 1683
  19. 319
  20. 36
  21. 203
  22. 95
  23. 45
  24. 1274
  25. 2842
  26. 190
  27. 36
  28. 232
  29. 441
  30. 1372
  31. 2475
  32. 1683
  33. 57
  34. 2254
  35. 190
  36. 1683
  37. 57
  38. 114
  39. 196
  40. 171

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