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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 470 · 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. 1.81 × 4 =
  2. 2.24 × 8 =
  3. 3.63 × 4 =
  4. 4.126 × 4 =
  5. 5.41 × 4 =
  6. 6.16 × 8 =
  7. 7.61 × 8 =
  8. 8.60 × 8 =
  9. 9.74 × 8 =
  10. 10.34 × 4 =
  11. 11.50 × 4 =
  12. 12.149 × 4 =
  13. 13.146 × 4 =
  14. 14.75 × 8 =
  15. 15.125 × 4 =
  16. 16.21 × 8 =
  17. 17.70 × 4 =
  18. 18.72 × 8 =
  19. 19.56 × 4 =
  20. 20.58 × 4 =
  21. 21.46 × 4 =
  22. 22.103 × 4 =
  23. 23.46 × 8 =
  24. 24.53 × 8 =
  25. 25.105 × 4 =
  26. 26.68 × 8 =
  27. 27.28 × 4 =
  28. 28.36 × 8 =
  29. 29.48 × 4 =
  30. 30.85 × 4 =
  31. 31.63 × 4 =
  32. 32.28 × 8 =
  33. 33.97 × 4 =
  34. 34.19 × 8 =
  35. 35.27 × 4 =
  36. 36.13 × 8 =
  37. 37.57 × 4 =
  38. 38.137 × 4 =
  39. 39.35 × 8 =
  40. 40.126 × 4 =

Answer key

  1. 324
  2. 192
  3. 252
  4. 504
  5. 164
  6. 128
  7. 488
  8. 480
  9. 592
  10. 136
  11. 200
  12. 596
  13. 584
  14. 600
  15. 500
  16. 168
  17. 280
  18. 576
  19. 224
  20. 232
  21. 184
  22. 412
  23. 368
  24. 424
  25. 420
  26. 544
  27. 112
  28. 288
  29. 192
  30. 340
  31. 252
  32. 224
  33. 388
  34. 152
  35. 108
  36. 104
  37. 228
  38. 548
  39. 280
  40. 504

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