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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 311 · 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. 1.51 × 8 =
  2. 2.124 × 4 =
  3. 3.56 × 4 =
  4. 4.118 × 4 =
  5. 5.153 × 4 =
  6. 6.30 × 8 =
  7. 7.26 × 4 =
  8. 8.17 × 8 =
  9. 9.65 × 8 =
  10. 10.108 × 4 =
  11. 11.12 × 8 =
  12. 12.40 × 8 =
  13. 13.45 × 4 =
  14. 14.117 × 4 =
  15. 15.137 × 4 =
  16. 16.31 × 4 =
  17. 17.26 × 8 =
  18. 18.39 × 8 =
  19. 19.42 × 8 =
  20. 20.123 × 4 =
  21. 21.152 × 4 =
  22. 22.22 × 8 =
  23. 23.44 × 4 =
  24. 24.38 × 8 =
  25. 25.53 × 8 =
  26. 26.14 × 4 =
  27. 27.31 × 8 =
  28. 28.61 × 8 =
  29. 29.32 × 8 =
  30. 30.84 × 4 =
  31. 31.61 × 8 =
  32. 32.40 × 4 =
  33. 33.29 × 8 =
  34. 34.38 × 8 =
  35. 35.151 × 4 =
  36. 36.31 × 4 =
  37. 37.37 × 4 =
  38. 38.32 × 8 =
  39. 39.94 × 4 =
  40. 40.45 × 8 =

Answer key

  1. 408
  2. 496
  3. 224
  4. 472
  5. 612
  6. 240
  7. 104
  8. 136
  9. 520
  10. 432
  11. 96
  12. 320
  13. 180
  14. 468
  15. 548
  16. 124
  17. 208
  18. 312
  19. 336
  20. 492
  21. 608
  22. 176
  23. 176
  24. 304
  25. 424
  26. 56
  27. 248
  28. 488
  29. 256
  30. 336
  31. 488
  32. 160
  33. 232
  34. 304
  35. 604
  36. 124
  37. 148
  38. 256
  39. 376
  40. 360

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