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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 464 · 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. 1.26 × 4 =
  2. 2.28 × 4 =
  3. 3.90 × 4 =
  4. 4.73 × 8 =
  5. 5.81 × 4 =
  6. 6.15 × 8 =
  7. 7.136 × 4 =
  8. 8.29 × 8 =
  9. 9.24 × 8 =
  10. 10.17 × 8 =
  11. 11.92 × 4 =
  12. 12.64 × 8 =
  13. 13.96 × 4 =
  14. 14.27 × 8 =
  15. 15.15 × 4 =
  16. 16.55 × 8 =
  17. 17.146 × 4 =
  18. 18.16 × 8 =
  19. 19.63 × 4 =
  20. 20.51 × 4 =
  21. 21.20 × 8 =
  22. 22.13 × 8 =
  23. 23.45 × 4 =
  24. 24.62 × 8 =
  25. 25.19 × 4 =
  26. 26.75 × 4 =
  27. 27.27 × 8 =
  28. 28.101 × 4 =
  29. 29.80 × 4 =
  30. 30.21 × 4 =
  31. 31.140 × 4 =
  32. 32.41 × 8 =
  33. 33.70 × 8 =
  34. 34.56 × 8 =
  35. 35.86 × 4 =
  36. 36.43 × 4 =
  37. 37.145 × 4 =
  38. 38.107 × 4 =
  39. 39.31 × 4 =
  40. 40.135 × 4 =

Answer key

  1. 104
  2. 112
  3. 360
  4. 584
  5. 324
  6. 120
  7. 544
  8. 232
  9. 192
  10. 136
  11. 368
  12. 512
  13. 384
  14. 216
  15. 60
  16. 440
  17. 584
  18. 128
  19. 252
  20. 204
  21. 160
  22. 104
  23. 180
  24. 496
  25. 76
  26. 300
  27. 216
  28. 404
  29. 320
  30. 84
  31. 560
  32. 328
  33. 560
  34. 448
  35. 344
  36. 172
  37. 580
  38. 428
  39. 124
  40. 540

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