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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 872 · 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. 1.97 × 4 =
  2. 2.62 × 8 =
  3. 3.58 × 4 =
  4. 4.37 × 8 =
  5. 5.51 × 8 =
  6. 6.60 × 8 =
  7. 7.105 × 4 =
  8. 8.26 × 4 =
  9. 9.37 × 4 =
  10. 10.57 × 4 =
  11. 11.71 × 4 =
  12. 12.61 × 8 =
  13. 13.86 × 4 =
  14. 14.55 × 4 =
  15. 15.83 × 4 =
  16. 16.90 × 4 =
  17. 17.63 × 4 =
  18. 18.109 × 4 =
  19. 19.20 × 8 =
  20. 20.27 × 8 =
  21. 21.126 × 4 =
  22. 22.58 × 8 =
  23. 23.35 × 4 =
  24. 24.13 × 8 =
  25. 25.60 × 8 =
  26. 26.21 × 4 =
  27. 27.119 × 4 =
  28. 28.44 × 8 =
  29. 29.75 × 4 =
  30. 30.71 × 4 =
  31. 31.35 × 8 =
  32. 32.66 × 8 =
  33. 33.59 × 4 =
  34. 34.48 × 4 =
  35. 35.155 × 4 =
  36. 36.24 × 8 =
  37. 37.63 × 8 =
  38. 38.25 × 8 =
  39. 39.44 × 8 =
  40. 40.14 × 8 =

Answer key

  1. 388
  2. 496
  3. 232
  4. 296
  5. 408
  6. 480
  7. 420
  8. 104
  9. 148
  10. 228
  11. 284
  12. 488
  13. 344
  14. 220
  15. 332
  16. 360
  17. 252
  18. 436
  19. 160
  20. 216
  21. 504
  22. 464
  23. 140
  24. 104
  25. 480
  26. 84
  27. 476
  28. 352
  29. 300
  30. 284
  31. 280
  32. 528
  33. 236
  34. 192
  35. 620
  36. 192
  37. 504
  38. 200
  39. 352
  40. 112

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