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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 547 · 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. 1.25 × 8 =
  2. 2.40 × 4 =
  3. 3.148 × 4 =
  4. 4.46 × 8 =
  5. 5.109 × 4 =
  6. 6.131 × 4 =
  7. 7.51 × 8 =
  8. 8.31 × 8 =
  9. 9.23 × 4 =
  10. 10.63 × 4 =
  11. 11.119 × 4 =
  12. 12.146 × 4 =
  13. 13.66 × 8 =
  14. 14.152 × 4 =
  15. 15.31 × 8 =
  16. 16.150 × 4 =
  17. 17.40 × 8 =
  18. 18.31 × 8 =
  19. 19.70 × 4 =
  20. 20.18 × 8 =
  21. 21.21 × 8 =
  22. 22.64 × 8 =
  23. 23.67 × 8 =
  24. 24.57 × 4 =
  25. 25.17 × 8 =
  26. 26.116 × 4 =
  27. 27.47 × 8 =
  28. 28.73 × 4 =
  29. 29.76 × 4 =
  30. 30.50 × 8 =
  31. 31.30 × 8 =
  32. 32.21 × 8 =
  33. 33.77 × 4 =
  34. 34.57 × 4 =
  35. 35.146 × 4 =
  36. 36.118 × 4 =
  37. 37.72 × 8 =
  38. 38.37 × 8 =
  39. 39.17 × 8 =
  40. 40.30 × 4 =

Answer key

  1. 200
  2. 160
  3. 592
  4. 368
  5. 436
  6. 524
  7. 408
  8. 248
  9. 92
  10. 252
  11. 476
  12. 584
  13. 528
  14. 608
  15. 248
  16. 600
  17. 320
  18. 248
  19. 280
  20. 144
  21. 168
  22. 512
  23. 536
  24. 228
  25. 136
  26. 464
  27. 376
  28. 292
  29. 304
  30. 400
  31. 240
  32. 168
  33. 308
  34. 228
  35. 584
  36. 472
  37. 576
  38. 296
  39. 136
  40. 120

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