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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 750 · 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. 1.21 × 8 =
  2. 2.146 × 4 =
  3. 3.75 × 8 =
  4. 4.36 × 8 =
  5. 5.53 × 8 =
  6. 6.25 × 4 =
  7. 7.21 × 8 =
  8. 8.135 × 4 =
  9. 9.123 × 4 =
  10. 10.111 × 4 =
  11. 11.133 × 4 =
  12. 12.41 × 8 =
  13. 13.37 × 8 =
  14. 14.113 × 4 =
  15. 15.16 × 8 =
  16. 16.41 × 4 =
  17. 17.67 × 4 =
  18. 18.20 × 4 =
  19. 19.125 × 4 =
  20. 20.43 × 8 =
  21. 21.110 × 4 =
  22. 22.89 × 4 =
  23. 23.30 × 8 =
  24. 24.125 × 4 =
  25. 25.75 × 8 =
  26. 26.50 × 8 =
  27. 27.58 × 8 =
  28. 28.27 × 8 =
  29. 29.32 × 8 =
  30. 30.151 × 4 =
  31. 31.21 × 8 =
  32. 32.130 × 4 =
  33. 33.60 × 8 =
  34. 34.50 × 4 =
  35. 35.13 × 8 =
  36. 36.98 × 4 =
  37. 37.12 × 8 =
  38. 38.19 × 4 =
  39. 39.39 × 4 =
  40. 40.14 × 4 =

Answer key

  1. 168
  2. 584
  3. 600
  4. 288
  5. 424
  6. 100
  7. 168
  8. 540
  9. 492
  10. 444
  11. 532
  12. 328
  13. 296
  14. 452
  15. 128
  16. 164
  17. 268
  18. 80
  19. 500
  20. 344
  21. 440
  22. 356
  23. 240
  24. 500
  25. 600
  26. 400
  27. 464
  28. 216
  29. 256
  30. 604
  31. 168
  32. 520
  33. 480
  34. 200
  35. 104
  36. 392
  37. 96
  38. 76
  39. 156
  40. 56

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