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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 707 · 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. 1.117 × 4 =
  2. 2.22 × 8 =
  3. 3.24 × 4 =
  4. 4.27 × 8 =
  5. 5.31 × 8 =
  6. 6.73 × 4 =
  7. 7.56 × 4 =
  8. 8.153 × 4 =
  9. 9.57 × 8 =
  10. 10.65 × 4 =
  11. 11.21 × 8 =
  12. 12.20 × 4 =
  13. 13.52 × 8 =
  14. 14.60 × 8 =
  15. 15.64 × 8 =
  16. 16.159 × 4 =
  17. 17.19 × 4 =
  18. 18.64 × 4 =
  19. 19.57 × 4 =
  20. 20.37 × 8 =
  21. 21.27 × 4 =
  22. 22.30 × 4 =
  23. 23.87 × 4 =
  24. 24.143 × 4 =
  25. 25.29 × 8 =
  26. 26.121 × 4 =
  27. 27.13 × 8 =
  28. 28.15 × 8 =
  29. 29.25 × 8 =
  30. 30.99 × 4 =
  31. 31.159 × 4 =
  32. 32.28 × 4 =
  33. 33.35 × 4 =
  34. 34.67 × 8 =
  35. 35.45 × 4 =
  36. 36.56 × 4 =
  37. 37.49 × 4 =
  38. 38.67 × 8 =
  39. 39.66 × 8 =
  40. 40.66 × 4 =

Answer key

  1. 468
  2. 176
  3. 96
  4. 216
  5. 248
  6. 292
  7. 224
  8. 612
  9. 456
  10. 260
  11. 168
  12. 80
  13. 416
  14. 480
  15. 512
  16. 636
  17. 76
  18. 256
  19. 228
  20. 296
  21. 108
  22. 120
  23. 348
  24. 572
  25. 232
  26. 484
  27. 104
  28. 120
  29. 200
  30. 396
  31. 636
  32. 112
  33. 140
  34. 536
  35. 180
  36. 224
  37. 196
  38. 536
  39. 528
  40. 264

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