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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 365 · 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. 1.65 × 8 =
  2. 2.112 × 4 =
  3. 3.68 × 8 =
  4. 4.115 × 4 =
  5. 5.110 × 4 =
  6. 6.21 × 8 =
  7. 7.120 × 4 =
  8. 8.29 × 8 =
  9. 9.54 × 8 =
  10. 10.49 × 8 =
  11. 11.49 × 4 =
  12. 12.54 × 4 =
  13. 13.91 × 4 =
  14. 14.132 × 4 =
  15. 15.124 × 4 =
  16. 16.29 × 8 =
  17. 17.47 × 4 =
  18. 18.72 × 8 =
  19. 19.140 × 4 =
  20. 20.149 × 4 =
  21. 21.71 × 8 =
  22. 22.65 × 8 =
  23. 23.23 × 4 =
  24. 24.32 × 8 =
  25. 25.72 × 8 =
  26. 26.20 × 4 =
  27. 27.159 × 4 =
  28. 28.69 × 4 =
  29. 29.21 × 8 =
  30. 30.63 × 8 =
  31. 31.57 × 4 =
  32. 32.67 × 4 =
  33. 33.105 × 4 =
  34. 34.142 × 4 =
  35. 35.20 × 8 =
  36. 36.59 × 8 =
  37. 37.17 × 8 =
  38. 38.160 × 4 =
  39. 39.70 × 4 =
  40. 40.117 × 4 =

Answer key

  1. 520
  2. 448
  3. 544
  4. 460
  5. 440
  6. 168
  7. 480
  8. 232
  9. 432
  10. 392
  11. 196
  12. 216
  13. 364
  14. 528
  15. 496
  16. 232
  17. 188
  18. 576
  19. 560
  20. 596
  21. 568
  22. 520
  23. 92
  24. 256
  25. 576
  26. 80
  27. 636
  28. 276
  29. 168
  30. 504
  31. 228
  32. 268
  33. 420
  34. 568
  35. 160
  36. 472
  37. 136
  38. 640
  39. 280
  40. 468

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