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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 711 · 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. 1.37 × 8 =
  2. 2.26 × 8 =
  3. 3.53 × 8 =
  4. 4.72 × 8 =
  5. 5.150 × 4 =
  6. 6.51 × 8 =
  7. 7.38 × 4 =
  8. 8.58 × 8 =
  9. 9.58 × 8 =
  10. 10.69 × 4 =
  11. 11.36 × 8 =
  12. 12.140 × 4 =
  13. 13.131 × 4 =
  14. 14.119 × 4 =
  15. 15.31 × 4 =
  16. 16.54 × 4 =
  17. 17.14 × 8 =
  18. 18.52 × 8 =
  19. 19.156 × 4 =
  20. 20.33 × 8 =
  21. 21.59 × 4 =
  22. 22.70 × 4 =
  23. 23.20 × 8 =
  24. 24.78 × 4 =
  25. 25.66 × 8 =
  26. 26.104 × 4 =
  27. 27.27 × 8 =
  28. 28.22 × 8 =
  29. 29.100 × 4 =
  30. 30.65 × 8 =
  31. 31.19 × 8 =
  32. 32.30 × 8 =
  33. 33.26 × 4 =
  34. 34.50 × 8 =
  35. 35.61 × 8 =
  36. 36.157 × 4 =
  37. 37.31 × 8 =
  38. 38.63 × 8 =
  39. 39.50 × 8 =
  40. 40.19 × 8 =

Answer key

  1. 296
  2. 208
  3. 424
  4. 576
  5. 600
  6. 408
  7. 152
  8. 464
  9. 464
  10. 276
  11. 288
  12. 560
  13. 524
  14. 476
  15. 124
  16. 216
  17. 112
  18. 416
  19. 624
  20. 264
  21. 236
  22. 280
  23. 160
  24. 312
  25. 528
  26. 416
  27. 216
  28. 176
  29. 400
  30. 520
  31. 152
  32. 240
  33. 104
  34. 400
  35. 488
  36. 628
  37. 248
  38. 504
  39. 400
  40. 152

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