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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 161 · 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. 1.32 × 8 =
  2. 2.25 × 8 =
  3. 3.130 × 4 =
  4. 4.67 × 8 =
  5. 5.23 × 8 =
  6. 6.49 × 4 =
  7. 7.148 × 4 =
  8. 8.29 × 4 =
  9. 9.84 × 4 =
  10. 10.107 × 4 =
  11. 11.113 × 4 =
  12. 12.28 × 4 =
  13. 13.13 × 4 =
  14. 14.23 × 8 =
  15. 15.29 × 8 =
  16. 16.30 × 8 =
  17. 17.133 × 4 =
  18. 18.75 × 8 =
  19. 19.61 × 8 =
  20. 20.52 × 8 =
  21. 21.139 × 4 =
  22. 22.37 × 8 =
  23. 23.62 × 8 =
  24. 24.14 × 4 =
  25. 25.101 × 4 =
  26. 26.31 × 4 =
  27. 27.58 × 8 =
  28. 28.66 × 4 =
  29. 29.85 × 4 =
  30. 30.35 × 8 =
  31. 31.67 × 8 =
  32. 32.90 × 4 =
  33. 33.14 × 8 =
  34. 34.20 × 8 =
  35. 35.116 × 4 =
  36. 36.34 × 4 =
  37. 37.20 × 8 =
  38. 38.28 × 8 =
  39. 39.155 × 4 =
  40. 40.39 × 8 =

Answer key

  1. 256
  2. 200
  3. 520
  4. 536
  5. 184
  6. 196
  7. 592
  8. 116
  9. 336
  10. 428
  11. 452
  12. 112
  13. 52
  14. 184
  15. 232
  16. 240
  17. 532
  18. 600
  19. 488
  20. 416
  21. 556
  22. 296
  23. 496
  24. 56
  25. 404
  26. 124
  27. 464
  28. 264
  29. 340
  30. 280
  31. 536
  32. 360
  33. 112
  34. 160
  35. 464
  36. 136
  37. 160
  38. 224
  39. 620
  40. 312

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