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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 539 · 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. 1.32 × 8 =
  2. 2.51 × 8 =
  3. 3.22 × 4 =
  4. 4.20 × 8 =
  5. 5.57 × 8 =
  6. 6.60 × 8 =
  7. 7.21 × 8 =
  8. 8.61 × 8 =
  9. 9.72 × 8 =
  10. 10.35 × 8 =
  11. 11.28 × 8 =
  12. 12.44 × 4 =
  13. 13.46 × 8 =
  14. 14.57 × 8 =
  15. 15.23 × 8 =
  16. 16.24 × 8 =
  17. 17.30 × 4 =
  18. 18.41 × 4 =
  19. 19.67 × 4 =
  20. 20.42 × 4 =
  21. 21.80 × 4 =
  22. 22.64 × 4 =
  23. 23.58 × 4 =
  24. 24.92 × 4 =
  25. 25.28 × 8 =
  26. 26.140 × 4 =
  27. 27.30 × 4 =
  28. 28.66 × 4 =
  29. 29.23 × 4 =
  30. 30.89 × 4 =
  31. 31.48 × 4 =
  32. 32.33 × 4 =
  33. 33.125 × 4 =
  34. 34.32 × 8 =
  35. 35.51 × 8 =
  36. 36.135 × 4 =
  37. 37.66 × 8 =
  38. 38.48 × 4 =
  39. 39.25 × 8 =
  40. 40.96 × 4 =

Answer key

  1. 256
  2. 408
  3. 88
  4. 160
  5. 456
  6. 480
  7. 168
  8. 488
  9. 576
  10. 280
  11. 224
  12. 176
  13. 368
  14. 456
  15. 184
  16. 192
  17. 120
  18. 164
  19. 268
  20. 168
  21. 320
  22. 256
  23. 232
  24. 368
  25. 224
  26. 560
  27. 120
  28. 264
  29. 92
  30. 356
  31. 192
  32. 132
  33. 500
  34. 256
  35. 408
  36. 540
  37. 528
  38. 192
  39. 200
  40. 384

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