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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 130 · 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. 1.26 × 8 =
  2. 2.106 × 4 =
  3. 3.64 × 4 =
  4. 4.46 × 4 =
  5. 5.25 × 4 =
  6. 6.59 × 8 =
  7. 7.25 × 8 =
  8. 8.35 × 8 =
  9. 9.60 × 8 =
  10. 10.82 × 4 =
  11. 11.34 × 8 =
  12. 12.81 × 4 =
  13. 13.109 × 4 =
  14. 14.14 × 8 =
  15. 15.116 × 4 =
  16. 16.31 × 4 =
  17. 17.20 × 8 =
  18. 18.39 × 4 =
  19. 19.59 × 8 =
  20. 20.39 × 8 =
  21. 21.73 × 8 =
  22. 22.72 × 8 =
  23. 23.103 × 4 =
  24. 24.102 × 4 =
  25. 25.54 × 4 =
  26. 26.23 × 4 =
  27. 27.47 × 4 =
  28. 28.34 × 4 =
  29. 29.94 × 4 =
  30. 30.65 × 8 =
  31. 31.68 × 4 =
  32. 32.143 × 4 =
  33. 33.51 × 4 =
  34. 34.41 × 8 =
  35. 35.101 × 4 =
  36. 36.149 × 4 =
  37. 37.75 × 8 =
  38. 38.69 × 4 =
  39. 39.124 × 4 =
  40. 40.84 × 4 =

Answer key

  1. 208
  2. 424
  3. 256
  4. 184
  5. 100
  6. 472
  7. 200
  8. 280
  9. 480
  10. 328
  11. 272
  12. 324
  13. 436
  14. 112
  15. 464
  16. 124
  17. 160
  18. 156
  19. 472
  20. 312
  21. 584
  22. 576
  23. 412
  24. 408
  25. 216
  26. 92
  27. 188
  28. 136
  29. 376
  30. 520
  31. 272
  32. 572
  33. 204
  34. 328
  35. 404
  36. 596
  37. 600
  38. 276
  39. 496
  40. 336

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