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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 989 · 40 questions
TalentJR

The fast method (Double up): × 4: double, then double again. × 8: double three times. To double a big number, double the tens and the ones separately and add: double 37 = 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.115 × 4 =
  2. 2.35 × 8 =
  3. 3.21 × 8 =
  4. 4.102 × 4 =
  5. 5.76 × 4 =
  6. 6.39 × 8 =
  7. 7.40 × 8 =
  8. 8.20 × 8 =
  9. 9.19 × 8 =
  10. 10.24 × 8 =
  11. 11.53 × 8 =
  12. 12.46 × 4 =
  13. 13.13 × 8 =
  14. 14.14 × 8 =
  15. 15.37 × 4 =
  16. 16.86 × 4 =
  17. 17.64 × 8 =
  18. 18.24 × 8 =
  19. 19.74 × 4 =
  20. 20.17 × 4 =
  21. 21.139 × 4 =
  22. 22.79 × 4 =
  23. 23.111 × 4 =
  24. 24.41 × 8 =
  25. 25.84 × 4 =
  26. 26.46 × 4 =
  27. 27.19 × 4 =
  28. 28.48 × 4 =
  29. 29.18 × 4 =
  30. 30.116 × 4 =
  31. 31.130 × 4 =
  32. 32.102 × 4 =
  33. 33.67 × 4 =
  34. 34.131 × 4 =
  35. 35.19 × 4 =
  36. 36.26 × 8 =
  37. 37.19 × 4 =
  38. 38.15 × 4 =
  39. 39.20 × 8 =
  40. 40.26 × 8 =

Answer key

  1. 460
  2. 280
  3. 168
  4. 408
  5. 304
  6. 312
  7. 320
  8. 160
  9. 152
  10. 192
  11. 424
  12. 184
  13. 104
  14. 112
  15. 148
  16. 344
  17. 512
  18. 192
  19. 296
  20. 68
  21. 556
  22. 316
  23. 444
  24. 328
  25. 336
  26. 184
  27. 76
  28. 192
  29. 72
  30. 464
  31. 520
  32. 408
  33. 268
  34. 524
  35. 76
  36. 208
  37. 76
  38. 60
  39. 160
  40. 208

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