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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 316 · 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. 1.50 × 8 =
  2. 2.38 × 8 =
  3. 3.91 × 4 =
  4. 4.119 × 4 =
  5. 5.143 × 4 =
  6. 6.30 × 8 =
  7. 7.65 × 4 =
  8. 8.41 × 4 =
  9. 9.17 × 4 =
  10. 10.113 × 4 =
  11. 11.62 × 8 =
  12. 12.124 × 4 =
  13. 13.12 × 8 =
  14. 14.40 × 8 =
  15. 15.32 × 4 =
  16. 16.15 × 4 =
  17. 17.27 × 8 =
  18. 18.77 × 4 =
  19. 19.57 × 8 =
  20. 20.48 × 8 =
  21. 21.156 × 4 =
  22. 22.72 × 8 =
  23. 23.27 × 4 =
  24. 24.15 × 8 =
  25. 25.96 × 4 =
  26. 26.99 × 4 =
  27. 27.24 × 8 =
  28. 28.70 × 8 =
  29. 29.31 × 8 =
  30. 30.21 × 8 =
  31. 31.98 × 4 =
  32. 32.126 × 4 =
  33. 33.71 × 4 =
  34. 34.95 × 4 =
  35. 35.12 × 8 =
  36. 36.56 × 4 =
  37. 37.38 × 8 =
  38. 38.45 × 8 =
  39. 39.67 × 8 =
  40. 40.73 × 4 =

Answer key

  1. 400
  2. 304
  3. 364
  4. 476
  5. 572
  6. 240
  7. 260
  8. 164
  9. 68
  10. 452
  11. 496
  12. 496
  13. 96
  14. 320
  15. 128
  16. 60
  17. 216
  18. 308
  19. 456
  20. 384
  21. 624
  22. 576
  23. 108
  24. 120
  25. 384
  26. 396
  27. 192
  28. 560
  29. 248
  30. 168
  31. 392
  32. 504
  33. 284
  34. 380
  35. 96
  36. 224
  37. 304
  38. 360
  39. 536
  40. 292

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