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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 105 · 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. 1.52 × 8 =
  2. 2.95 × 4 =
  3. 3.22 × 4 =
  4. 4.33 × 4 =
  5. 5.35 × 8 =
  6. 6.16 × 4 =
  7. 7.51 × 8 =
  8. 8.29 × 4 =
  9. 9.152 × 4 =
  10. 10.55 × 4 =
  11. 11.27 × 8 =
  12. 12.158 × 4 =
  13. 13.26 × 4 =
  14. 14.68 × 4 =
  15. 15.47 × 8 =
  16. 16.18 × 8 =
  17. 17.133 × 4 =
  18. 18.134 × 4 =
  19. 19.64 × 4 =
  20. 20.16 × 8 =
  21. 21.14 × 4 =
  22. 22.20 × 8 =
  23. 23.56 × 4 =
  24. 24.75 × 4 =
  25. 25.159 × 4 =
  26. 26.128 × 4 =
  27. 27.67 × 8 =
  28. 28.61 × 4 =
  29. 29.37 × 4 =
  30. 30.122 × 4 =
  31. 31.133 × 4 =
  32. 32.77 × 4 =
  33. 33.42 × 4 =
  34. 34.128 × 4 =
  35. 35.126 × 4 =
  36. 36.55 × 4 =
  37. 37.25 × 8 =
  38. 38.56 × 8 =
  39. 39.156 × 4 =
  40. 40.99 × 4 =

Answer key

  1. 416
  2. 380
  3. 88
  4. 132
  5. 280
  6. 64
  7. 408
  8. 116
  9. 608
  10. 220
  11. 216
  12. 632
  13. 104
  14. 272
  15. 376
  16. 144
  17. 532
  18. 536
  19. 256
  20. 128
  21. 56
  22. 160
  23. 224
  24. 300
  25. 636
  26. 512
  27. 536
  28. 244
  29. 148
  30. 488
  31. 532
  32. 308
  33. 168
  34. 512
  35. 504
  36. 220
  37. 200
  38. 448
  39. 624
  40. 396

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