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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 209 · 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. 1.38 × 4 =
  2. 2.41 × 8 =
  3. 3.17 × 8 =
  4. 4.130 × 4 =
  5. 5.53 × 8 =
  6. 6.130 × 4 =
  7. 7.111 × 4 =
  8. 8.41 × 4 =
  9. 9.40 × 4 =
  10. 10.39 × 4 =
  11. 11.21 × 8 =
  12. 12.149 × 4 =
  13. 13.40 × 8 =
  14. 14.54 × 8 =
  15. 15.16 × 4 =
  16. 16.60 × 8 =
  17. 17.44 × 8 =
  18. 18.60 × 8 =
  19. 19.47 × 8 =
  20. 20.55 × 4 =
  21. 21.37 × 8 =
  22. 22.30 × 8 =
  23. 23.52 × 8 =
  24. 24.30 × 8 =
  25. 25.73 × 8 =
  26. 26.93 × 4 =
  27. 27.35 × 8 =
  28. 28.150 × 4 =
  29. 29.28 × 8 =
  30. 30.34 × 4 =
  31. 31.72 × 8 =
  32. 32.134 × 4 =
  33. 33.20 × 4 =
  34. 34.32 × 8 =
  35. 35.22 × 8 =
  36. 36.40 × 8 =
  37. 37.78 × 4 =
  38. 38.123 × 4 =
  39. 39.14 × 8 =
  40. 40.51 × 4 =

Answer key

  1. 152
  2. 328
  3. 136
  4. 520
  5. 424
  6. 520
  7. 444
  8. 164
  9. 160
  10. 156
  11. 168
  12. 596
  13. 320
  14. 432
  15. 64
  16. 480
  17. 352
  18. 480
  19. 376
  20. 220
  21. 296
  22. 240
  23. 416
  24. 240
  25. 584
  26. 372
  27. 280
  28. 600
  29. 224
  30. 136
  31. 576
  32. 536
  33. 80
  34. 256
  35. 176
  36. 320
  37. 312
  38. 492
  39. 112
  40. 204

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