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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 744 · 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. 1.48 × 8 =
  2. 2.45 × 8 =
  3. 3.21 × 4 =
  4. 4.154 × 4 =
  5. 5.132 × 4 =
  6. 6.37 × 4 =
  7. 7.33 × 4 =
  8. 8.60 × 8 =
  9. 9.118 × 4 =
  10. 10.42 × 4 =
  11. 11.20 × 8 =
  12. 12.19 × 4 =
  13. 13.96 × 4 =
  14. 14.54 × 4 =
  15. 15.46 × 4 =
  16. 16.31 × 4 =
  17. 17.47 × 8 =
  18. 18.13 × 8 =
  19. 19.105 × 4 =
  20. 20.103 × 4 =
  21. 21.20 × 8 =
  22. 22.143 × 4 =
  23. 23.32 × 8 =
  24. 24.74 × 8 =
  25. 25.54 × 4 =
  26. 26.103 × 4 =
  27. 27.84 × 4 =
  28. 28.28 × 4 =
  29. 29.44 × 4 =
  30. 30.38 × 8 =
  31. 31.28 × 4 =
  32. 32.22 × 4 =
  33. 33.159 × 4 =
  34. 34.30 × 8 =
  35. 35.18 × 8 =
  36. 36.145 × 4 =
  37. 37.17 × 8 =
  38. 38.13 × 8 =
  39. 39.114 × 4 =
  40. 40.36 × 8 =

Answer key

  1. 384
  2. 360
  3. 84
  4. 616
  5. 528
  6. 148
  7. 132
  8. 480
  9. 472
  10. 168
  11. 160
  12. 76
  13. 384
  14. 216
  15. 184
  16. 124
  17. 376
  18. 104
  19. 420
  20. 412
  21. 160
  22. 572
  23. 256
  24. 592
  25. 216
  26. 412
  27. 336
  28. 112
  29. 176
  30. 304
  31. 112
  32. 88
  33. 636
  34. 240
  35. 144
  36. 580
  37. 136
  38. 104
  39. 456
  40. 288

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