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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 320 · 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. 1.28 × 4 =
  2. 2.58 × 8 =
  3. 3.12 × 8 =
  4. 4.53 × 8 =
  5. 5.29 × 8 =
  6. 6.100 × 4 =
  7. 7.29 × 4 =
  8. 8.39 × 4 =
  9. 9.55 × 4 =
  10. 10.25 × 8 =
  11. 11.98 × 4 =
  12. 12.22 × 4 =
  13. 13.17 × 8 =
  14. 14.126 × 4 =
  15. 15.48 × 8 =
  16. 16.85 × 4 =
  17. 17.40 × 4 =
  18. 18.43 × 4 =
  19. 19.55 × 8 =
  20. 20.65 × 8 =
  21. 21.53 × 8 =
  22. 22.13 × 4 =
  23. 23.68 × 8 =
  24. 24.48 × 4 =
  25. 25.51 × 8 =
  26. 26.130 × 4 =
  27. 27.30 × 8 =
  28. 28.31 × 8 =
  29. 29.53 × 8 =
  30. 30.60 × 4 =
  31. 31.66 × 8 =
  32. 32.37 × 8 =
  33. 33.132 × 4 =
  34. 34.75 × 4 =
  35. 35.69 × 8 =
  36. 36.71 × 4 =
  37. 37.115 × 4 =
  38. 38.158 × 4 =
  39. 39.60 × 8 =
  40. 40.25 × 4 =

Answer key

  1. 112
  2. 464
  3. 96
  4. 424
  5. 232
  6. 400
  7. 116
  8. 156
  9. 220
  10. 200
  11. 392
  12. 88
  13. 136
  14. 504
  15. 384
  16. 340
  17. 160
  18. 172
  19. 440
  20. 520
  21. 424
  22. 52
  23. 544
  24. 192
  25. 408
  26. 520
  27. 240
  28. 248
  29. 424
  30. 240
  31. 528
  32. 296
  33. 528
  34. 300
  35. 552
  36. 284
  37. 460
  38. 632
  39. 480
  40. 100

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