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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 756 · 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. 1.16 × 8 =
  2. 2.147 × 4 =
  3. 3.31 × 8 =
  4. 4.102 × 4 =
  5. 5.18 × 4 =
  6. 6.19 × 4 =
  7. 7.81 × 4 =
  8. 8.32 × 8 =
  9. 9.48 × 8 =
  10. 10.73 × 8 =
  11. 11.33 × 8 =
  12. 12.50 × 8 =
  13. 13.26 × 8 =
  14. 14.128 × 4 =
  15. 15.127 × 4 =
  16. 16.69 × 4 =
  17. 17.46 × 4 =
  18. 18.124 × 4 =
  19. 19.145 × 4 =
  20. 20.24 × 4 =
  21. 21.28 × 8 =
  22. 22.115 × 4 =
  23. 23.69 × 4 =
  24. 24.25 × 8 =
  25. 25.55 × 4 =
  26. 26.68 × 4 =
  27. 27.35 × 8 =
  28. 28.145 × 4 =
  29. 29.68 × 8 =
  30. 30.114 × 4 =
  31. 31.37 × 4 =
  32. 32.132 × 4 =
  33. 33.59 × 8 =
  34. 34.27 × 8 =
  35. 35.123 × 4 =
  36. 36.74 × 8 =
  37. 37.140 × 4 =
  38. 38.58 × 4 =
  39. 39.49 × 8 =
  40. 40.28 × 8 =

Answer key

  1. 128
  2. 588
  3. 248
  4. 408
  5. 72
  6. 76
  7. 324
  8. 256
  9. 384
  10. 584
  11. 264
  12. 400
  13. 208
  14. 512
  15. 508
  16. 276
  17. 184
  18. 496
  19. 580
  20. 96
  21. 224
  22. 460
  23. 276
  24. 200
  25. 220
  26. 272
  27. 280
  28. 580
  29. 544
  30. 456
  31. 148
  32. 528
  33. 472
  34. 216
  35. 492
  36. 592
  37. 560
  38. 232
  39. 392
  40. 224

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