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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 580 · 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. 1.73 × 4 =
  2. 2.72 × 8 =
  3. 3.65 × 8 =
  4. 4.69 × 8 =
  5. 5.36 × 8 =
  6. 6.84 × 4 =
  7. 7.24 × 4 =
  8. 8.24 × 8 =
  9. 9.123 × 4 =
  10. 10.13 × 8 =
  11. 11.26 × 8 =
  12. 12.108 × 4 =
  13. 13.55 × 4 =
  14. 14.30 × 4 =
  15. 15.55 × 4 =
  16. 16.31 × 8 =
  17. 17.48 × 8 =
  18. 18.46 × 8 =
  19. 19.16 × 4 =
  20. 20.60 × 4 =
  21. 21.25 × 8 =
  22. 22.32 × 4 =
  23. 23.57 × 8 =
  24. 24.22 × 8 =
  25. 25.49 × 8 =
  26. 26.111 × 4 =
  27. 27.17 × 4 =
  28. 28.30 × 4 =
  29. 29.57 × 4 =
  30. 30.32 × 8 =
  31. 31.64 × 8 =
  32. 32.153 × 4 =
  33. 33.102 × 4 =
  34. 34.75 × 8 =
  35. 35.21 × 4 =
  36. 36.14 × 8 =
  37. 37.51 × 8 =
  38. 38.15 × 4 =
  39. 39.30 × 4 =
  40. 40.72 × 8 =

Answer key

  1. 292
  2. 576
  3. 520
  4. 552
  5. 288
  6. 336
  7. 96
  8. 192
  9. 492
  10. 104
  11. 208
  12. 432
  13. 220
  14. 120
  15. 220
  16. 248
  17. 384
  18. 368
  19. 64
  20. 240
  21. 200
  22. 128
  23. 456
  24. 176
  25. 392
  26. 444
  27. 68
  28. 120
  29. 228
  30. 256
  31. 512
  32. 612
  33. 408
  34. 600
  35. 84
  36. 112
  37. 408
  38. 60
  39. 120
  40. 576

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