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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 443 · 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. 1.99 × 4 =
  2. 2.65 × 8 =
  3. 3.68 × 4 =
  4. 4.30 × 8 =
  5. 5.12 × 8 =
  6. 6.38 × 8 =
  7. 7.96 × 4 =
  8. 8.99 × 4 =
  9. 9.52 × 4 =
  10. 10.31 × 4 =
  11. 11.24 × 4 =
  12. 12.114 × 4 =
  13. 13.96 × 4 =
  14. 14.21 × 8 =
  15. 15.115 × 4 =
  16. 16.150 × 4 =
  17. 17.128 × 4 =
  18. 18.25 × 4 =
  19. 19.56 × 8 =
  20. 20.19 × 8 =
  21. 21.74 × 8 =
  22. 22.26 × 8 =
  23. 23.17 × 8 =
  24. 24.59 × 8 =
  25. 25.71 × 8 =
  26. 26.31 × 4 =
  27. 27.58 × 4 =
  28. 28.17 × 8 =
  29. 29.16 × 4 =
  30. 30.152 × 4 =
  31. 31.55 × 4 =
  32. 32.36 × 8 =
  33. 33.54 × 8 =
  34. 34.70 × 8 =
  35. 35.154 × 4 =
  36. 36.96 × 4 =
  37. 37.140 × 4 =
  38. 38.119 × 4 =
  39. 39.31 × 8 =
  40. 40.13 × 4 =

Answer key

  1. 396
  2. 520
  3. 272
  4. 240
  5. 96
  6. 304
  7. 384
  8. 396
  9. 208
  10. 124
  11. 96
  12. 456
  13. 384
  14. 168
  15. 460
  16. 600
  17. 512
  18. 100
  19. 448
  20. 152
  21. 592
  22. 208
  23. 136
  24. 472
  25. 568
  26. 124
  27. 232
  28. 136
  29. 64
  30. 608
  31. 220
  32. 288
  33. 432
  34. 560
  35. 616
  36. 384
  37. 560
  38. 476
  39. 248
  40. 52

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