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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 688 · 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. 1.42 × 4 =
  2. 2.18 × 8 =
  3. 3.20 × 4 =
  4. 4.28 × 4 =
  5. 5.28 × 8 =
  6. 6.16 × 8 =
  7. 7.73 × 4 =
  8. 8.152 × 4 =
  9. 9.87 × 4 =
  10. 10.44 × 8 =
  11. 11.53 × 8 =
  12. 12.18 × 8 =
  13. 13.39 × 8 =
  14. 14.146 × 4 =
  15. 15.55 × 8 =
  16. 16.69 × 8 =
  17. 17.41 × 4 =
  18. 18.36 × 4 =
  19. 19.20 × 4 =
  20. 20.148 × 4 =
  21. 21.38 × 8 =
  22. 22.113 × 4 =
  23. 23.39 × 8 =
  24. 24.45 × 8 =
  25. 25.92 × 4 =
  26. 26.126 × 4 =
  27. 27.37 × 8 =
  28. 28.116 × 4 =
  29. 29.120 × 4 =
  30. 30.86 × 4 =
  31. 31.105 × 4 =
  32. 32.58 × 8 =
  33. 33.94 × 4 =
  34. 34.15 × 4 =
  35. 35.112 × 4 =
  36. 36.16 × 4 =
  37. 37.81 × 4 =
  38. 38.15 × 8 =
  39. 39.90 × 4 =
  40. 40.25 × 4 =

Answer key

  1. 168
  2. 144
  3. 80
  4. 112
  5. 224
  6. 128
  7. 292
  8. 608
  9. 348
  10. 352
  11. 424
  12. 144
  13. 312
  14. 584
  15. 440
  16. 552
  17. 164
  18. 144
  19. 80
  20. 592
  21. 304
  22. 452
  23. 312
  24. 360
  25. 368
  26. 504
  27. 296
  28. 464
  29. 480
  30. 344
  31. 420
  32. 464
  33. 376
  34. 60
  35. 448
  36. 64
  37. 324
  38. 120
  39. 360
  40. 100

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