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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 234 · 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. 1.87 × 4 =
  2. 2.40 × 4 =
  3. 3.36 × 8 =
  4. 4.80 × 4 =
  5. 5.72 × 4 =
  6. 6.42 × 4 =
  7. 7.16 × 4 =
  8. 8.107 × 4 =
  9. 9.54 × 8 =
  10. 10.117 × 4 =
  11. 11.140 × 4 =
  12. 12.34 × 8 =
  13. 13.66 × 4 =
  14. 14.20 × 4 =
  15. 15.39 × 8 =
  16. 16.52 × 8 =
  17. 17.33 × 8 =
  18. 18.51 × 4 =
  19. 19.104 × 4 =
  20. 20.20 × 8 =
  21. 21.48 × 4 =
  22. 22.101 × 4 =
  23. 23.51 × 8 =
  24. 24.15 × 4 =
  25. 25.63 × 8 =
  26. 26.17 × 8 =
  27. 27.24 × 8 =
  28. 28.45 × 8 =
  29. 29.138 × 4 =
  30. 30.15 × 8 =
  31. 31.82 × 4 =
  32. 32.82 × 4 =
  33. 33.144 × 4 =
  34. 34.71 × 4 =
  35. 35.12 × 8 =
  36. 36.75 × 8 =
  37. 37.17 × 8 =
  38. 38.40 × 4 =
  39. 39.147 × 4 =
  40. 40.40 × 8 =

Answer key

  1. 348
  2. 160
  3. 288
  4. 320
  5. 288
  6. 168
  7. 64
  8. 428
  9. 432
  10. 468
  11. 560
  12. 272
  13. 264
  14. 80
  15. 312
  16. 416
  17. 264
  18. 204
  19. 416
  20. 160
  21. 192
  22. 404
  23. 408
  24. 60
  25. 504
  26. 136
  27. 192
  28. 360
  29. 552
  30. 120
  31. 328
  32. 328
  33. 576
  34. 284
  35. 96
  36. 600
  37. 136
  38. 160
  39. 588
  40. 320

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