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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 848 · 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. 1.132 × 4 =
  2. 2.53 × 4 =
  3. 3.64 × 4 =
  4. 4.36 × 8 =
  5. 5.82 × 4 =
  6. 6.96 × 4 =
  7. 7.19 × 4 =
  8. 8.32 × 8 =
  9. 9.21 × 4 =
  10. 10.16 × 8 =
  11. 11.39 × 4 =
  12. 12.61 × 8 =
  13. 13.110 × 4 =
  14. 14.121 × 4 =
  15. 15.12 × 8 =
  16. 16.16 × 8 =
  17. 17.65 × 8 =
  18. 18.117 × 4 =
  19. 19.53 × 8 =
  20. 20.140 × 4 =
  21. 21.81 × 4 =
  22. 22.101 × 4 =
  23. 23.45 × 8 =
  24. 24.59 × 4 =
  25. 25.112 × 4 =
  26. 26.65 × 8 =
  27. 27.50 × 8 =
  28. 28.17 × 4 =
  29. 29.28 × 4 =
  30. 30.95 × 4 =
  31. 31.12 × 8 =
  32. 32.137 × 4 =
  33. 33.75 × 8 =
  34. 34.155 × 4 =
  35. 35.59 × 8 =
  36. 36.19 × 4 =
  37. 37.38 × 8 =
  38. 38.65 × 4 =
  39. 39.25 × 8 =
  40. 40.59 × 8 =

Answer key

  1. 528
  2. 212
  3. 256
  4. 288
  5. 328
  6. 384
  7. 76
  8. 256
  9. 84
  10. 128
  11. 156
  12. 488
  13. 440
  14. 484
  15. 96
  16. 128
  17. 520
  18. 468
  19. 424
  20. 560
  21. 324
  22. 404
  23. 360
  24. 236
  25. 448
  26. 520
  27. 400
  28. 68
  29. 112
  30. 380
  31. 96
  32. 548
  33. 600
  34. 620
  35. 472
  36. 76
  37. 304
  38. 260
  39. 200
  40. 472

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