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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 314 · 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. 1.101 × 4 =
  2. 2.16 × 4 =
  3. 3.23 × 4 =
  4. 4.91 × 4 =
  5. 5.72 × 8 =
  6. 6.48 × 8 =
  7. 7.93 × 4 =
  8. 8.18 × 4 =
  9. 9.53 × 8 =
  10. 10.102 × 4 =
  11. 11.25 × 8 =
  12. 12.52 × 8 =
  13. 13.116 × 4 =
  14. 14.38 × 4 =
  15. 15.63 × 8 =
  16. 16.63 × 8 =
  17. 17.68 × 4 =
  18. 18.20 × 8 =
  19. 19.113 × 4 =
  20. 20.122 × 4 =
  21. 21.20 × 8 =
  22. 22.21 × 8 =
  23. 23.17 × 8 =
  24. 24.39 × 8 =
  25. 25.51 × 4 =
  26. 26.45 × 4 =
  27. 27.158 × 4 =
  28. 28.40 × 8 =
  29. 29.68 × 4 =
  30. 30.56 × 8 =
  31. 31.39 × 8 =
  32. 32.55 × 8 =
  33. 33.55 × 8 =
  34. 34.138 × 4 =
  35. 35.28 × 8 =
  36. 36.39 × 8 =
  37. 37.101 × 4 =
  38. 38.117 × 4 =
  39. 39.128 × 4 =
  40. 40.55 × 8 =

Answer key

  1. 404
  2. 64
  3. 92
  4. 364
  5. 576
  6. 384
  7. 372
  8. 72
  9. 424
  10. 408
  11. 200
  12. 416
  13. 464
  14. 152
  15. 504
  16. 504
  17. 272
  18. 160
  19. 452
  20. 488
  21. 160
  22. 168
  23. 136
  24. 312
  25. 204
  26. 180
  27. 632
  28. 320
  29. 272
  30. 448
  31. 312
  32. 440
  33. 440
  34. 552
  35. 224
  36. 312
  37. 404
  38. 468
  39. 512
  40. 440

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