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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 254 · 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. 1.63 × 8 =
  2. 2.125 × 4 =
  3. 3.20 × 8 =
  4. 4.149 × 4 =
  5. 5.43 × 8 =
  6. 6.19 × 8 =
  7. 7.129 × 4 =
  8. 8.17 × 8 =
  9. 9.81 × 4 =
  10. 10.154 × 4 =
  11. 11.112 × 4 =
  12. 12.28 × 4 =
  13. 13.56 × 8 =
  14. 14.67 × 8 =
  15. 15.12 × 8 =
  16. 16.35 × 8 =
  17. 17.21 × 8 =
  18. 18.34 × 4 =
  19. 19.39 × 4 =
  20. 20.146 × 4 =
  21. 21.25 × 8 =
  22. 22.59 × 8 =
  23. 23.71 × 8 =
  24. 24.33 × 8 =
  25. 25.109 × 4 =
  26. 26.118 × 4 =
  27. 27.20 × 8 =
  28. 28.75 × 8 =
  29. 29.18 × 4 =
  30. 30.57 × 4 =
  31. 31.26 × 8 =
  32. 32.149 × 4 =
  33. 33.26 × 4 =
  34. 34.123 × 4 =
  35. 35.64 × 4 =
  36. 36.27 × 8 =
  37. 37.33 × 8 =
  38. 38.13 × 8 =
  39. 39.37 × 8 =
  40. 40.46 × 4 =

Answer key

  1. 504
  2. 500
  3. 160
  4. 596
  5. 344
  6. 152
  7. 516
  8. 136
  9. 324
  10. 616
  11. 448
  12. 112
  13. 448
  14. 536
  15. 96
  16. 280
  17. 168
  18. 136
  19. 156
  20. 584
  21. 200
  22. 472
  23. 568
  24. 264
  25. 436
  26. 472
  27. 160
  28. 600
  29. 72
  30. 228
  31. 208
  32. 596
  33. 104
  34. 492
  35. 256
  36. 216
  37. 264
  38. 104
  39. 296
  40. 184

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