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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 373 · 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. 1.32 × 8 =
  2. 2.158 × 4 =
  3. 3.60 × 8 =
  4. 4.99 × 4 =
  5. 5.14 × 8 =
  6. 6.42 × 8 =
  7. 7.28 × 8 =
  8. 8.133 × 4 =
  9. 9.95 × 4 =
  10. 10.74 × 4 =
  11. 11.125 × 4 =
  12. 12.60 × 4 =
  13. 13.64 × 8 =
  14. 14.20 × 8 =
  15. 15.48 × 8 =
  16. 16.76 × 4 =
  17. 17.20 × 8 =
  18. 18.75 × 8 =
  19. 19.45 × 8 =
  20. 20.41 × 8 =
  21. 21.50 × 4 =
  22. 22.112 × 4 =
  23. 23.30 × 8 =
  24. 24.30 × 4 =
  25. 25.67 × 8 =
  26. 26.146 × 4 =
  27. 27.35 × 8 =
  28. 28.143 × 4 =
  29. 29.70 × 8 =
  30. 30.33 × 8 =
  31. 31.72 × 8 =
  32. 32.105 × 4 =
  33. 33.75 × 8 =
  34. 34.160 × 4 =
  35. 35.72 × 8 =
  36. 36.102 × 4 =
  37. 37.113 × 4 =
  38. 38.145 × 4 =
  39. 39.28 × 8 =
  40. 40.13 × 4 =

Answer key

  1. 256
  2. 632
  3. 480
  4. 396
  5. 112
  6. 336
  7. 224
  8. 532
  9. 380
  10. 296
  11. 500
  12. 240
  13. 512
  14. 160
  15. 384
  16. 304
  17. 160
  18. 600
  19. 360
  20. 328
  21. 200
  22. 448
  23. 240
  24. 120
  25. 536
  26. 584
  27. 280
  28. 572
  29. 560
  30. 264
  31. 576
  32. 420
  33. 600
  34. 640
  35. 576
  36. 408
  37. 452
  38. 580
  39. 224
  40. 52

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