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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 267 · 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. 1.114 × 4 =
  2. 2.72 × 4 =
  3. 3.42 × 4 =
  4. 4.25 × 8 =
  5. 5.158 × 4 =
  6. 6.31 × 8 =
  7. 7.37 × 4 =
  8. 8.137 × 4 =
  9. 9.18 × 8 =
  10. 10.37 × 8 =
  11. 11.51 × 8 =
  12. 12.95 × 4 =
  13. 13.70 × 8 =
  14. 14.70 × 4 =
  15. 15.33 × 8 =
  16. 16.39 × 8 =
  17. 17.59 × 8 =
  18. 18.33 × 4 =
  19. 19.106 × 4 =
  20. 20.104 × 4 =
  21. 21.91 × 4 =
  22. 22.55 × 4 =
  23. 23.113 × 4 =
  24. 24.28 × 8 =
  25. 25.20 × 4 =
  26. 26.41 × 4 =
  27. 27.14 × 4 =
  28. 28.84 × 4 =
  29. 29.75 × 4 =
  30. 30.47 × 8 =
  31. 31.64 × 8 =
  32. 32.49 × 8 =
  33. 33.15 × 4 =
  34. 34.19 × 8 =
  35. 35.95 × 4 =
  36. 36.47 × 4 =
  37. 37.59 × 8 =
  38. 38.15 × 4 =
  39. 39.53 × 4 =
  40. 40.50 × 4 =

Answer key

  1. 456
  2. 288
  3. 168
  4. 200
  5. 632
  6. 248
  7. 148
  8. 548
  9. 144
  10. 296
  11. 408
  12. 380
  13. 560
  14. 280
  15. 264
  16. 312
  17. 472
  18. 132
  19. 424
  20. 416
  21. 364
  22. 220
  23. 452
  24. 224
  25. 80
  26. 164
  27. 56
  28. 336
  29. 300
  30. 376
  31. 512
  32. 392
  33. 60
  34. 152
  35. 380
  36. 188
  37. 472
  38. 60
  39. 212
  40. 200

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