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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 851 · 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. 1.63 × 4 =
  2. 2.28 × 8 =
  3. 3.131 × 4 =
  4. 4.21 × 8 =
  5. 5.102 × 4 =
  6. 6.14 × 4 =
  7. 7.30 × 8 =
  8. 8.68 × 4 =
  9. 9.35 × 4 =
  10. 10.70 × 4 =
  11. 11.16 × 4 =
  12. 12.91 × 4 =
  13. 13.32 × 4 =
  14. 14.117 × 4 =
  15. 15.51 × 8 =
  16. 16.95 × 4 =
  17. 17.14 × 8 =
  18. 18.55 × 4 =
  19. 19.39 × 8 =
  20. 20.64 × 8 =
  21. 21.136 × 4 =
  22. 22.72 × 8 =
  23. 23.58 × 8 =
  24. 24.64 × 8 =
  25. 25.29 × 4 =
  26. 26.65 × 8 =
  27. 27.33 × 4 =
  28. 28.92 × 4 =
  29. 29.103 × 4 =
  30. 30.12 × 8 =
  31. 31.35 × 8 =
  32. 32.63 × 8 =
  33. 33.32 × 8 =
  34. 34.33 × 8 =
  35. 35.73 × 8 =
  36. 36.74 × 8 =
  37. 37.27 × 8 =
  38. 38.117 × 4 =
  39. 39.131 × 4 =
  40. 40.41 × 8 =

Answer key

  1. 252
  2. 224
  3. 524
  4. 168
  5. 408
  6. 56
  7. 240
  8. 272
  9. 140
  10. 280
  11. 64
  12. 364
  13. 128
  14. 468
  15. 408
  16. 380
  17. 112
  18. 220
  19. 312
  20. 512
  21. 544
  22. 576
  23. 464
  24. 512
  25. 116
  26. 520
  27. 132
  28. 368
  29. 412
  30. 96
  31. 280
  32. 504
  33. 256
  34. 264
  35. 584
  36. 592
  37. 216
  38. 468
  39. 524
  40. 328

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