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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 217 · 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. 1.12 × 8 =
  2. 2.63 × 8 =
  3. 3.147 × 4 =
  4. 4.25 × 8 =
  5. 5.64 × 8 =
  6. 6.16 × 8 =
  7. 7.13 × 8 =
  8. 8.65 × 8 =
  9. 9.43 × 8 =
  10. 10.40 × 8 =
  11. 11.34 × 8 =
  12. 12.24 × 4 =
  13. 13.112 × 4 =
  14. 14.25 × 8 =
  15. 15.113 × 4 =
  16. 16.62 × 4 =
  17. 17.88 × 4 =
  18. 18.117 × 4 =
  19. 19.65 × 4 =
  20. 20.74 × 8 =
  21. 21.47 × 4 =
  22. 22.25 × 8 =
  23. 23.18 × 8 =
  24. 24.18 × 8 =
  25. 25.114 × 4 =
  26. 26.47 × 8 =
  27. 27.60 × 4 =
  28. 28.75 × 8 =
  29. 29.122 × 4 =
  30. 30.30 × 4 =
  31. 31.47 × 8 =
  32. 32.31 × 4 =
  33. 33.109 × 4 =
  34. 34.19 × 4 =
  35. 35.64 × 4 =
  36. 36.57 × 4 =
  37. 37.52 × 4 =
  38. 38.143 × 4 =
  39. 39.42 × 8 =
  40. 40.80 × 4 =

Answer key

  1. 96
  2. 504
  3. 588
  4. 200
  5. 512
  6. 128
  7. 104
  8. 520
  9. 344
  10. 320
  11. 272
  12. 96
  13. 448
  14. 200
  15. 452
  16. 248
  17. 352
  18. 468
  19. 260
  20. 592
  21. 188
  22. 200
  23. 144
  24. 144
  25. 456
  26. 376
  27. 240
  28. 600
  29. 488
  30. 120
  31. 376
  32. 124
  33. 436
  34. 76
  35. 256
  36. 228
  37. 208
  38. 572
  39. 336
  40. 320

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