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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 888 · 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. 1.15 × 98 =
  2. 2.3 × 98 =
  3. 3.9 × 49 =
  4. 4.6 × 98 =
  5. 5.9 × 9 =
  6. 6.8 × 49 =
  7. 7.6 × 19 =
  8. 8.21 × 98 =
  9. 9.6 × 29 =
  10. 10.15 × 99 =
  11. 11.4 × 49 =
  12. 12.11 × 19 =
  13. 13.8 × 49 =
  14. 14.33 × 98 =
  15. 15.14 × 19 =
  16. 16.11 × 9 =
  17. 17.12 × 29 =
  18. 18.3 × 49 =
  19. 19.3 × 49 =
  20. 20.13 × 29 =
  21. 21.11 × 49 =
  22. 22.24 × 98 =
  23. 23.26 × 98 =
  24. 24.4 × 29 =
  25. 25.15 × 49 =
  26. 26.5 × 29 =
  27. 27.17 × 99 =
  28. 28.38 × 98 =
  29. 29.6 × 49 =
  30. 30.38 × 98 =
  31. 31.20 × 98 =
  32. 32.3 × 49 =
  33. 33.6 × 9 =
  34. 34.4 × 9 =
  35. 35.22 × 98 =
  36. 36.3 × 19 =
  37. 37.4 × 9 =
  38. 38.5 × 9 =
  39. 39.3 × 98 =
  40. 40.9 × 19 =

Answer key

  1. 1470
  2. 294
  3. 441
  4. 588
  5. 81
  6. 392
  7. 114
  8. 2058
  9. 174
  10. 1485
  11. 196
  12. 209
  13. 392
  14. 3234
  15. 266
  16. 99
  17. 348
  18. 147
  19. 147
  20. 377
  21. 539
  22. 2352
  23. 2548
  24. 116
  25. 735
  26. 145
  27. 1683
  28. 3724
  29. 294
  30. 3724
  31. 1960
  32. 147
  33. 54
  34. 36
  35. 2156
  36. 57
  37. 36
  38. 45
  39. 294
  40. 171

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