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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 702 · 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. 1.149 × 4 =
  2. 2.58 × 8 =
  3. 3.55 × 4 =
  4. 4.72 × 8 =
  5. 5.38 × 8 =
  6. 6.22 × 8 =
  7. 7.13 × 8 =
  8. 8.74 × 4 =
  9. 9.47 × 8 =
  10. 10.27 × 8 =
  11. 11.29 × 4 =
  12. 12.17 × 8 =
  13. 13.51 × 8 =
  14. 14.47 × 8 =
  15. 15.39 × 8 =
  16. 16.20 × 8 =
  17. 17.12 × 8 =
  18. 18.37 × 8 =
  19. 19.66 × 4 =
  20. 20.129 × 4 =
  21. 21.60 × 4 =
  22. 22.105 × 4 =
  23. 23.117 × 4 =
  24. 24.48 × 4 =
  25. 25.108 × 4 =
  26. 26.137 × 4 =
  27. 27.72 × 4 =
  28. 28.17 × 8 =
  29. 29.32 × 8 =
  30. 30.124 × 4 =
  31. 31.75 × 4 =
  32. 32.60 × 4 =
  33. 33.73 × 8 =
  34. 34.57 × 4 =
  35. 35.18 × 8 =
  36. 36.108 × 4 =
  37. 37.34 × 8 =
  38. 38.65 × 8 =
  39. 39.96 × 4 =
  40. 40.115 × 4 =

Answer key

  1. 596
  2. 464
  3. 220
  4. 576
  5. 304
  6. 176
  7. 104
  8. 296
  9. 376
  10. 216
  11. 116
  12. 136
  13. 408
  14. 376
  15. 312
  16. 160
  17. 96
  18. 296
  19. 264
  20. 516
  21. 240
  22. 420
  23. 468
  24. 192
  25. 432
  26. 548
  27. 288
  28. 136
  29. 256
  30. 496
  31. 300
  32. 240
  33. 584
  34. 228
  35. 144
  36. 432
  37. 272
  38. 520
  39. 384
  40. 460

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