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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 610 · 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. 1.160 × 4 =
  2. 2.57 × 4 =
  3. 3.103 × 4 =
  4. 4.77 × 4 =
  5. 5.60 × 8 =
  6. 6.14 × 8 =
  7. 7.22 × 8 =
  8. 8.109 × 4 =
  9. 9.75 × 8 =
  10. 10.64 × 8 =
  11. 11.49 × 4 =
  12. 12.68 × 4 =
  13. 13.124 × 4 =
  14. 14.45 × 4 =
  15. 15.59 × 8 =
  16. 16.16 × 8 =
  17. 17.36 × 8 =
  18. 18.55 × 8 =
  19. 19.36 × 8 =
  20. 20.63 × 8 =
  21. 21.21 × 4 =
  22. 22.34 × 4 =
  23. 23.26 × 8 =
  24. 24.15 × 8 =
  25. 25.33 × 8 =
  26. 26.31 × 8 =
  27. 27.21 × 8 =
  28. 28.27 × 8 =
  29. 29.60 × 8 =
  30. 30.16 × 8 =
  31. 31.74 × 8 =
  32. 32.132 × 4 =
  33. 33.20 × 4 =
  34. 34.113 × 4 =
  35. 35.33 × 4 =
  36. 36.99 × 4 =
  37. 37.159 × 4 =
  38. 38.76 × 4 =
  39. 39.51 × 8 =
  40. 40.17 × 8 =

Answer key

  1. 640
  2. 228
  3. 412
  4. 308
  5. 480
  6. 112
  7. 176
  8. 436
  9. 600
  10. 512
  11. 196
  12. 272
  13. 496
  14. 180
  15. 472
  16. 128
  17. 288
  18. 440
  19. 288
  20. 504
  21. 84
  22. 136
  23. 208
  24. 120
  25. 264
  26. 248
  27. 168
  28. 216
  29. 480
  30. 128
  31. 592
  32. 528
  33. 80
  34. 452
  35. 132
  36. 396
  37. 636
  38. 304
  39. 408
  40. 136

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