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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 645 · 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. 1.68 × 4 =
  2. 2.20 × 4 =
  3. 3.30 × 8 =
  4. 4.22 × 8 =
  5. 5.108 × 4 =
  6. 6.16 × 8 =
  7. 7.59 × 8 =
  8. 8.51 × 8 =
  9. 9.30 × 4 =
  10. 10.85 × 4 =
  11. 11.31 × 4 =
  12. 12.119 × 4 =
  13. 13.17 × 8 =
  14. 14.73 × 8 =
  15. 15.27 × 8 =
  16. 16.58 × 4 =
  17. 17.39 × 8 =
  18. 18.129 × 4 =
  19. 19.47 × 4 =
  20. 20.64 × 8 =
  21. 21.106 × 4 =
  22. 22.30 × 4 =
  23. 23.24 × 8 =
  24. 24.52 × 8 =
  25. 25.109 × 4 =
  26. 26.23 × 8 =
  27. 27.50 × 8 =
  28. 28.49 × 8 =
  29. 29.22 × 8 =
  30. 30.14 × 8 =
  31. 31.144 × 4 =
  32. 32.68 × 4 =
  33. 33.28 × 8 =
  34. 34.68 × 4 =
  35. 35.30 × 4 =
  36. 36.62 × 4 =
  37. 37.68 × 8 =
  38. 38.13 × 4 =
  39. 39.148 × 4 =
  40. 40.51 × 8 =

Answer key

  1. 272
  2. 80
  3. 240
  4. 176
  5. 432
  6. 128
  7. 472
  8. 408
  9. 120
  10. 340
  11. 124
  12. 476
  13. 136
  14. 584
  15. 216
  16. 232
  17. 312
  18. 516
  19. 188
  20. 512
  21. 424
  22. 120
  23. 192
  24. 416
  25. 436
  26. 184
  27. 400
  28. 392
  29. 176
  30. 112
  31. 576
  32. 272
  33. 224
  34. 272
  35. 120
  36. 248
  37. 544
  38. 52
  39. 592
  40. 408

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