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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 686 · 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. 1.16 × 8 =
  2. 2.23 × 4 =
  3. 3.42 × 4 =
  4. 4.28 × 8 =
  5. 5.25 × 8 =
  6. 6.55 × 8 =
  7. 7.59 × 8 =
  8. 8.74 × 8 =
  9. 9.85 × 4 =
  10. 10.31 × 4 =
  11. 11.48 × 8 =
  12. 12.64 × 4 =
  13. 13.49 × 8 =
  14. 14.113 × 4 =
  15. 15.80 × 4 =
  16. 16.151 × 4 =
  17. 17.81 × 4 =
  18. 18.50 × 8 =
  19. 19.53 × 8 =
  20. 20.113 × 4 =
  21. 21.15 × 8 =
  22. 22.39 × 8 =
  23. 23.18 × 8 =
  24. 24.103 × 4 =
  25. 25.22 × 8 =
  26. 26.142 × 4 =
  27. 27.126 × 4 =
  28. 28.149 × 4 =
  29. 29.51 × 8 =
  30. 30.115 × 4 =
  31. 31.72 × 8 =
  32. 32.56 × 4 =
  33. 33.44 × 8 =
  34. 34.15 × 8 =
  35. 35.75 × 8 =
  36. 36.38 × 8 =
  37. 37.43 × 4 =
  38. 38.28 × 4 =
  39. 39.55 × 8 =
  40. 40.18 × 4 =

Answer key

  1. 128
  2. 92
  3. 168
  4. 224
  5. 200
  6. 440
  7. 472
  8. 592
  9. 340
  10. 124
  11. 384
  12. 256
  13. 392
  14. 452
  15. 320
  16. 604
  17. 324
  18. 400
  19. 424
  20. 452
  21. 120
  22. 312
  23. 144
  24. 412
  25. 176
  26. 568
  27. 504
  28. 596
  29. 408
  30. 460
  31. 576
  32. 224
  33. 352
  34. 120
  35. 600
  36. 304
  37. 172
  38. 112
  39. 440
  40. 72

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