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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 72 · 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. 1.45 × 8 =
  2. 2.55 × 8 =
  3. 3.47 × 8 =
  4. 4.124 × 4 =
  5. 5.53 × 8 =
  6. 6.53 × 4 =
  7. 7.109 × 4 =
  8. 8.77 × 4 =
  9. 9.60 × 4 =
  10. 10.46 × 8 =
  11. 11.17 × 8 =
  12. 12.21 × 4 =
  13. 13.52 × 4 =
  14. 14.42 × 4 =
  15. 15.89 × 4 =
  16. 16.104 × 4 =
  17. 17.29 × 4 =
  18. 18.38 × 8 =
  19. 19.53 × 8 =
  20. 20.53 × 8 =
  21. 21.98 × 4 =
  22. 22.18 × 8 =
  23. 23.34 × 4 =
  24. 24.50 × 4 =
  25. 25.19 × 8 =
  26. 26.95 × 4 =
  27. 27.68 × 4 =
  28. 28.28 × 8 =
  29. 29.86 × 4 =
  30. 30.52 × 4 =
  31. 31.65 × 8 =
  32. 32.65 × 8 =
  33. 33.105 × 4 =
  34. 34.54 × 4 =
  35. 35.70 × 4 =
  36. 36.65 × 8 =
  37. 37.16 × 4 =
  38. 38.119 × 4 =
  39. 39.51 × 8 =
  40. 40.138 × 4 =

Answer key

  1. 360
  2. 440
  3. 376
  4. 496
  5. 424
  6. 212
  7. 436
  8. 308
  9. 240
  10. 368
  11. 136
  12. 84
  13. 208
  14. 168
  15. 356
  16. 416
  17. 116
  18. 304
  19. 424
  20. 424
  21. 392
  22. 144
  23. 136
  24. 200
  25. 152
  26. 380
  27. 272
  28. 224
  29. 344
  30. 208
  31. 520
  32. 520
  33. 420
  34. 216
  35. 280
  36. 520
  37. 64
  38. 476
  39. 408
  40. 552

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