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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 86 · 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. 1.142 × 4 =
  2. 2.12 × 8 =
  3. 3.76 × 4 =
  4. 4.55 × 4 =
  5. 5.32 × 4 =
  6. 6.27 × 8 =
  7. 7.30 × 8 =
  8. 8.70 × 8 =
  9. 9.113 × 4 =
  10. 10.67 × 8 =
  11. 11.15 × 4 =
  12. 12.49 × 4 =
  13. 13.14 × 8 =
  14. 14.45 × 8 =
  15. 15.16 × 4 =
  16. 16.72 × 8 =
  17. 17.116 × 4 =
  18. 18.18 × 8 =
  19. 19.155 × 4 =
  20. 20.53 × 4 =
  21. 21.30 × 4 =
  22. 22.29 × 8 =
  23. 23.107 × 4 =
  24. 24.83 × 4 =
  25. 25.51 × 4 =
  26. 26.56 × 8 =
  27. 27.123 × 4 =
  28. 28.25 × 8 =
  29. 29.59 × 8 =
  30. 30.61 × 8 =
  31. 31.28 × 8 =
  32. 32.36 × 8 =
  33. 33.81 × 4 =
  34. 34.71 × 8 =
  35. 35.21 × 4 =
  36. 36.72 × 8 =
  37. 37.126 × 4 =
  38. 38.130 × 4 =
  39. 39.85 × 4 =
  40. 40.34 × 4 =

Answer key

  1. 568
  2. 96
  3. 304
  4. 220
  5. 128
  6. 216
  7. 240
  8. 560
  9. 452
  10. 536
  11. 60
  12. 196
  13. 112
  14. 360
  15. 64
  16. 576
  17. 464
  18. 144
  19. 620
  20. 212
  21. 120
  22. 232
  23. 428
  24. 332
  25. 204
  26. 448
  27. 492
  28. 200
  29. 472
  30. 488
  31. 224
  32. 288
  33. 324
  34. 568
  35. 84
  36. 576
  37. 504
  38. 520
  39. 340
  40. 136

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