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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 434 · 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. 2.42 × 4 =
  3. 3.22 × 8 =
  4. 4.154 × 4 =
  5. 5.23 × 4 =
  6. 6.107 × 4 =
  7. 7.73 × 8 =
  8. 8.29 × 8 =
  9. 9.26 × 8 =
  10. 10.58 × 4 =
  11. 11.74 × 4 =
  12. 12.14 × 4 =
  13. 13.52 × 8 =
  14. 14.139 × 4 =
  15. 15.19 × 4 =
  16. 16.28 × 4 =
  17. 17.68 × 8 =
  18. 18.99 × 4 =
  19. 19.63 × 8 =
  20. 20.89 × 4 =
  21. 21.75 × 4 =
  22. 22.52 × 8 =
  23. 23.60 × 4 =
  24. 24.60 × 4 =
  25. 25.63 × 8 =
  26. 26.157 × 4 =
  27. 27.17 × 8 =
  28. 28.57 × 4 =
  29. 29.64 × 8 =
  30. 30.35 × 8 =
  31. 31.55 × 8 =
  32. 32.31 × 4 =
  33. 33.67 × 8 =
  34. 34.69 × 8 =
  35. 35.88 × 4 =
  36. 36.72 × 8 =
  37. 37.124 × 4 =
  38. 38.22 × 4 =
  39. 39.54 × 8 =
  40. 40.61 × 4 =

Answer key

  1. 544
  2. 168
  3. 176
  4. 616
  5. 92
  6. 428
  7. 584
  8. 232
  9. 208
  10. 232
  11. 296
  12. 56
  13. 416
  14. 556
  15. 76
  16. 112
  17. 544
  18. 396
  19. 504
  20. 356
  21. 300
  22. 416
  23. 240
  24. 240
  25. 504
  26. 628
  27. 136
  28. 228
  29. 512
  30. 280
  31. 440
  32. 124
  33. 536
  34. 552
  35. 352
  36. 576
  37. 496
  38. 88
  39. 432
  40. 244

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