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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 88 · 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. 1.62 × 8 =
  2. 2.21 × 8 =
  3. 3.51 × 8 =
  4. 4.63 × 4 =
  5. 5.81 × 4 =
  6. 6.31 × 8 =
  7. 7.22 × 4 =
  8. 8.85 × 4 =
  9. 9.63 × 8 =
  10. 10.53 × 4 =
  11. 11.44 × 4 =
  12. 12.53 × 8 =
  13. 13.20 × 8 =
  14. 14.29 × 8 =
  15. 15.55 × 8 =
  16. 16.113 × 4 =
  17. 17.25 × 8 =
  18. 18.37 × 8 =
  19. 19.68 × 8 =
  20. 20.57 × 8 =
  21. 21.26 × 8 =
  22. 22.65 × 4 =
  23. 23.33 × 8 =
  24. 24.28 × 8 =
  25. 25.69 × 4 =
  26. 26.27 × 4 =
  27. 27.98 × 4 =
  28. 28.111 × 4 =
  29. 29.64 × 8 =
  30. 30.36 × 8 =
  31. 31.92 × 4 =
  32. 32.62 × 4 =
  33. 33.109 × 4 =
  34. 34.40 × 8 =
  35. 35.38 × 8 =
  36. 36.53 × 8 =
  37. 37.45 × 8 =
  38. 38.13 × 8 =
  39. 39.71 × 4 =
  40. 40.63 × 8 =

Answer key

  1. 496
  2. 168
  3. 408
  4. 252
  5. 324
  6. 248
  7. 88
  8. 340
  9. 504
  10. 212
  11. 176
  12. 424
  13. 160
  14. 232
  15. 440
  16. 452
  17. 200
  18. 296
  19. 544
  20. 456
  21. 208
  22. 260
  23. 264
  24. 224
  25. 276
  26. 108
  27. 392
  28. 444
  29. 512
  30. 288
  31. 368
  32. 248
  33. 436
  34. 320
  35. 304
  36. 424
  37. 360
  38. 104
  39. 284
  40. 504

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