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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 388 · 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. 1.23 × 8 =
  2. 2.17 × 4 =
  3. 3.39 × 8 =
  4. 4.45 × 4 =
  5. 5.25 × 8 =
  6. 6.29 × 4 =
  7. 7.157 × 4 =
  8. 8.18 × 8 =
  9. 9.59 × 4 =
  10. 10.133 × 4 =
  11. 11.13 × 4 =
  12. 12.22 × 4 =
  13. 13.17 × 4 =
  14. 14.18 × 8 =
  15. 15.53 × 8 =
  16. 16.124 × 4 =
  17. 17.30 × 8 =
  18. 18.49 × 4 =
  19. 19.64 × 4 =
  20. 20.70 × 8 =
  21. 21.46 × 8 =
  22. 22.103 × 4 =
  23. 23.113 × 4 =
  24. 24.70 × 4 =
  25. 25.36 × 4 =
  26. 26.36 × 8 =
  27. 27.29 × 4 =
  28. 28.19 × 8 =
  29. 29.61 × 8 =
  30. 30.52 × 8 =
  31. 31.94 × 4 =
  32. 32.36 × 4 =
  33. 33.19 × 8 =
  34. 34.39 × 4 =
  35. 35.20 × 4 =
  36. 36.61 × 8 =
  37. 37.30 × 4 =
  38. 38.75 × 8 =
  39. 39.14 × 8 =
  40. 40.80 × 4 =

Answer key

  1. 184
  2. 68
  3. 312
  4. 180
  5. 200
  6. 116
  7. 628
  8. 144
  9. 236
  10. 532
  11. 52
  12. 88
  13. 68
  14. 144
  15. 424
  16. 496
  17. 240
  18. 196
  19. 256
  20. 560
  21. 368
  22. 412
  23. 452
  24. 280
  25. 144
  26. 288
  27. 116
  28. 152
  29. 488
  30. 416
  31. 376
  32. 144
  33. 152
  34. 156
  35. 80
  36. 488
  37. 120
  38. 600
  39. 112
  40. 320

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