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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 749 · 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. 1.72 × 8 =
  2. 2.51 × 8 =
  3. 3.91 × 4 =
  4. 4.59 × 8 =
  5. 5.56 × 8 =
  6. 6.60 × 8 =
  7. 7.160 × 4 =
  8. 8.143 × 4 =
  9. 9.55 × 8 =
  10. 10.22 × 4 =
  11. 11.81 × 4 =
  12. 12.107 × 4 =
  13. 13.102 × 4 =
  14. 14.65 × 4 =
  15. 15.73 × 8 =
  16. 16.96 × 4 =
  17. 17.37 × 8 =
  18. 18.43 × 4 =
  19. 19.48 × 8 =
  20. 20.77 × 4 =
  21. 21.39 × 8 =
  22. 22.33 × 4 =
  23. 23.17 × 8 =
  24. 24.71 × 4 =
  25. 25.32 × 8 =
  26. 26.20 × 4 =
  27. 27.20 × 4 =
  28. 28.94 × 4 =
  29. 29.37 × 4 =
  30. 30.47 × 8 =
  31. 31.152 × 4 =
  32. 32.39 × 8 =
  33. 33.47 × 4 =
  34. 34.54 × 4 =
  35. 35.12 × 8 =
  36. 36.45 × 8 =
  37. 37.48 × 4 =
  38. 38.119 × 4 =
  39. 39.70 × 8 =
  40. 40.30 × 4 =

Answer key

  1. 576
  2. 408
  3. 364
  4. 472
  5. 448
  6. 480
  7. 640
  8. 572
  9. 440
  10. 88
  11. 324
  12. 428
  13. 408
  14. 260
  15. 584
  16. 384
  17. 296
  18. 172
  19. 384
  20. 308
  21. 312
  22. 132
  23. 136
  24. 284
  25. 256
  26. 80
  27. 80
  28. 376
  29. 148
  30. 376
  31. 608
  32. 312
  33. 188
  34. 216
  35. 96
  36. 360
  37. 192
  38. 476
  39. 560
  40. 120

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