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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 4 · 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. 1.31 × 8 =
  2. 2.21 × 8 =
  3. 3.31 × 8 =
  4. 4.57 × 4 =
  5. 5.139 × 4 =
  6. 6.66 × 8 =
  7. 7.94 × 4 =
  8. 8.35 × 8 =
  9. 9.13 × 8 =
  10. 10.64 × 8 =
  11. 11.129 × 4 =
  12. 12.80 × 4 =
  13. 13.59 × 8 =
  14. 14.59 × 8 =
  15. 15.65 × 4 =
  16. 16.58 × 8 =
  17. 17.46 × 8 =
  18. 18.60 × 8 =
  19. 19.108 × 4 =
  20. 20.42 × 8 =
  21. 21.116 × 4 =
  22. 22.109 × 4 =
  23. 23.29 × 4 =
  24. 24.62 × 8 =
  25. 25.52 × 8 =
  26. 26.66 × 8 =
  27. 27.15 × 8 =
  28. 28.68 × 8 =
  29. 29.63 × 4 =
  30. 30.150 × 4 =
  31. 31.42 × 8 =
  32. 32.22 × 4 =
  33. 33.60 × 8 =
  34. 34.154 × 4 =
  35. 35.18 × 8 =
  36. 36.20 × 4 =
  37. 37.122 × 4 =
  38. 38.106 × 4 =
  39. 39.125 × 4 =
  40. 40.62 × 4 =

Answer key

  1. 248
  2. 168
  3. 248
  4. 228
  5. 556
  6. 528
  7. 376
  8. 280
  9. 104
  10. 512
  11. 516
  12. 320
  13. 472
  14. 472
  15. 260
  16. 464
  17. 368
  18. 480
  19. 432
  20. 336
  21. 464
  22. 436
  23. 116
  24. 496
  25. 416
  26. 528
  27. 120
  28. 544
  29. 252
  30. 600
  31. 336
  32. 88
  33. 480
  34. 616
  35. 144
  36. 80
  37. 488
  38. 424
  39. 500
  40. 248

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