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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 854 · 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. 1.44 × 4 =
  2. 2.23 × 8 =
  3. 3.85 × 4 =
  4. 4.39 × 8 =
  5. 5.55 × 4 =
  6. 6.15 × 8 =
  7. 7.147 × 4 =
  8. 8.17 × 4 =
  9. 9.55 × 8 =
  10. 10.38 × 8 =
  11. 11.67 × 4 =
  12. 12.62 × 8 =
  13. 13.32 × 8 =
  14. 14.66 × 8 =
  15. 15.29 × 8 =
  16. 16.65 × 8 =
  17. 17.23 × 8 =
  18. 18.51 × 4 =
  19. 19.57 × 8 =
  20. 20.65 × 8 =
  21. 21.18 × 8 =
  22. 22.23 × 8 =
  23. 23.12 × 8 =
  24. 24.71 × 8 =
  25. 25.68 × 8 =
  26. 26.26 × 8 =
  27. 27.40 × 4 =
  28. 28.69 × 4 =
  29. 29.35 × 4 =
  30. 30.66 × 8 =
  31. 31.63 × 8 =
  32. 32.73 × 4 =
  33. 33.31 × 8 =
  34. 34.65 × 8 =
  35. 35.14 × 4 =
  36. 36.15 × 8 =
  37. 37.111 × 4 =
  38. 38.32 × 4 =
  39. 39.39 × 4 =
  40. 40.76 × 4 =

Answer key

  1. 176
  2. 184
  3. 340
  4. 312
  5. 220
  6. 120
  7. 588
  8. 68
  9. 440
  10. 304
  11. 268
  12. 496
  13. 256
  14. 528
  15. 232
  16. 520
  17. 184
  18. 204
  19. 456
  20. 520
  21. 144
  22. 184
  23. 96
  24. 568
  25. 544
  26. 208
  27. 160
  28. 276
  29. 140
  30. 528
  31. 504
  32. 292
  33. 248
  34. 520
  35. 56
  36. 120
  37. 444
  38. 128
  39. 156
  40. 304

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