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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 243 · 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. 1.134 × 4 =
  2. 2.30 × 4 =
  3. 3.59 × 8 =
  4. 4.33 × 4 =
  5. 5.35 × 8 =
  6. 6.25 × 8 =
  7. 7.84 × 4 =
  8. 8.18 × 4 =
  9. 9.65 × 8 =
  10. 10.22 × 8 =
  11. 11.92 × 4 =
  12. 12.17 × 4 =
  13. 13.154 × 4 =
  14. 14.94 × 4 =
  15. 15.63 × 8 =
  16. 16.51 × 8 =
  17. 17.25 × 4 =
  18. 18.72 × 8 =
  19. 19.20 × 8 =
  20. 20.35 × 8 =
  21. 21.41 × 8 =
  22. 22.30 × 8 =
  23. 23.44 × 4 =
  24. 24.41 × 8 =
  25. 25.62 × 4 =
  26. 26.25 × 8 =
  27. 27.41 × 8 =
  28. 28.64 × 8 =
  29. 29.14 × 8 =
  30. 30.58 × 4 =
  31. 31.68 × 8 =
  32. 32.42 × 8 =
  33. 33.19 × 4 =
  34. 34.52 × 4 =
  35. 35.67 × 8 =
  36. 36.59 × 8 =
  37. 37.110 × 4 =
  38. 38.37 × 4 =
  39. 39.138 × 4 =
  40. 40.21 × 4 =

Answer key

  1. 536
  2. 120
  3. 472
  4. 132
  5. 280
  6. 200
  7. 336
  8. 72
  9. 520
  10. 176
  11. 368
  12. 68
  13. 616
  14. 376
  15. 504
  16. 408
  17. 100
  18. 576
  19. 160
  20. 280
  21. 328
  22. 240
  23. 176
  24. 328
  25. 248
  26. 200
  27. 328
  28. 512
  29. 112
  30. 232
  31. 544
  32. 336
  33. 76
  34. 208
  35. 536
  36. 472
  37. 440
  38. 148
  39. 552
  40. 84

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