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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 788 · 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. 1.36 × 8 =
  2. 2.92 × 4 =
  3. 3.12 × 8 =
  4. 4.16 × 8 =
  5. 5.26 × 4 =
  6. 6.21 × 8 =
  7. 7.35 × 4 =
  8. 8.18 × 8 =
  9. 9.19 × 4 =
  10. 10.67 × 8 =
  11. 11.52 × 8 =
  12. 12.48 × 4 =
  13. 13.46 × 8 =
  14. 14.14 × 8 =
  15. 15.44 × 4 =
  16. 16.127 × 4 =
  17. 17.61 × 8 =
  18. 18.107 × 4 =
  19. 19.21 × 8 =
  20. 20.151 × 4 =
  21. 21.92 × 4 =
  22. 22.28 × 4 =
  23. 23.55 × 4 =
  24. 24.119 × 4 =
  25. 25.49 × 4 =
  26. 26.14 × 8 =
  27. 27.63 × 8 =
  28. 28.32 × 4 =
  29. 29.22 × 4 =
  30. 30.39 × 8 =
  31. 31.61 × 8 =
  32. 32.21 × 8 =
  33. 33.67 × 8 =
  34. 34.18 × 4 =
  35. 35.137 × 4 =
  36. 36.67 × 4 =
  37. 37.93 × 4 =
  38. 38.38 × 4 =
  39. 39.72 × 8 =
  40. 40.38 × 4 =

Answer key

  1. 288
  2. 368
  3. 96
  4. 128
  5. 104
  6. 168
  7. 140
  8. 144
  9. 76
  10. 536
  11. 416
  12. 192
  13. 368
  14. 112
  15. 176
  16. 508
  17. 488
  18. 428
  19. 168
  20. 604
  21. 368
  22. 112
  23. 220
  24. 476
  25. 196
  26. 112
  27. 504
  28. 128
  29. 88
  30. 312
  31. 488
  32. 168
  33. 536
  34. 72
  35. 548
  36. 268
  37. 372
  38. 152
  39. 576
  40. 152

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