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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 189 · 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. 1.68 × 8 =
  2. 2.153 × 4 =
  3. 3.146 × 4 =
  4. 4.58 × 4 =
  5. 5.63 × 8 =
  6. 6.56 × 8 =
  7. 7.158 × 4 =
  8. 8.68 × 8 =
  9. 9.48 × 8 =
  10. 10.40 × 8 =
  11. 11.155 × 4 =
  12. 12.47 × 8 =
  13. 13.41 × 4 =
  14. 14.36 × 8 =
  15. 15.63 × 4 =
  16. 16.13 × 8 =
  17. 17.118 × 4 =
  18. 18.64 × 8 =
  19. 19.97 × 4 =
  20. 20.14 × 8 =
  21. 21.47 × 4 =
  22. 22.31 × 8 =
  23. 23.72 × 4 =
  24. 24.67 × 8 =
  25. 25.113 × 4 =
  26. 26.29 × 8 =
  27. 27.116 × 4 =
  28. 28.100 × 4 =
  29. 29.39 × 8 =
  30. 30.57 × 4 =
  31. 31.110 × 4 =
  32. 32.70 × 4 =
  33. 33.144 × 4 =
  34. 34.30 × 8 =
  35. 35.55 × 8 =
  36. 36.114 × 4 =
  37. 37.102 × 4 =
  38. 38.18 × 8 =
  39. 39.17 × 4 =
  40. 40.52 × 8 =

Answer key

  1. 544
  2. 612
  3. 584
  4. 232
  5. 504
  6. 448
  7. 632
  8. 544
  9. 384
  10. 320
  11. 620
  12. 376
  13. 164
  14. 288
  15. 252
  16. 104
  17. 472
  18. 512
  19. 388
  20. 112
  21. 188
  22. 248
  23. 288
  24. 536
  25. 452
  26. 232
  27. 464
  28. 400
  29. 312
  30. 228
  31. 440
  32. 280
  33. 576
  34. 240
  35. 440
  36. 456
  37. 408
  38. 144
  39. 68
  40. 416

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