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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 106 · 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. 1.61 × 8 =
  2. 2.109 × 4 =
  3. 3.137 × 4 =
  4. 4.153 × 4 =
  5. 5.149 × 4 =
  6. 6.124 × 4 =
  7. 7.156 × 4 =
  8. 8.49 × 8 =
  9. 9.23 × 4 =
  10. 10.26 × 8 =
  11. 11.47 × 8 =
  12. 12.38 × 8 =
  13. 13.58 × 8 =
  14. 14.38 × 8 =
  15. 15.51 × 4 =
  16. 16.38 × 4 =
  17. 17.57 × 8 =
  18. 18.68 × 8 =
  19. 19.110 × 4 =
  20. 20.12 × 8 =
  21. 21.138 × 4 =
  22. 22.32 × 8 =
  23. 23.138 × 4 =
  24. 24.151 × 4 =
  25. 25.74 × 8 =
  26. 26.127 × 4 =
  27. 27.27 × 8 =
  28. 28.65 × 8 =
  29. 29.40 × 8 =
  30. 30.138 × 4 =
  31. 31.75 × 8 =
  32. 32.59 × 4 =
  33. 33.32 × 4 =
  34. 34.94 × 4 =
  35. 35.130 × 4 =
  36. 36.86 × 4 =
  37. 37.126 × 4 =
  38. 38.64 × 8 =
  39. 39.21 × 4 =
  40. 40.60 × 8 =

Answer key

  1. 488
  2. 436
  3. 548
  4. 612
  5. 596
  6. 496
  7. 624
  8. 392
  9. 92
  10. 208
  11. 376
  12. 304
  13. 464
  14. 304
  15. 204
  16. 152
  17. 456
  18. 544
  19. 440
  20. 96
  21. 552
  22. 256
  23. 552
  24. 604
  25. 592
  26. 508
  27. 216
  28. 520
  29. 320
  30. 552
  31. 600
  32. 236
  33. 128
  34. 376
  35. 520
  36. 344
  37. 504
  38. 512
  39. 84
  40. 480

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