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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 635 · 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. 1.26 × 8 =
  2. 2.59 × 8 =
  3. 3.153 × 4 =
  4. 4.20 × 8 =
  5. 5.34 × 8 =
  6. 6.61 × 8 =
  7. 7.12 × 8 =
  8. 8.19 × 8 =
  9. 9.21 × 4 =
  10. 10.48 × 4 =
  11. 11.92 × 4 =
  12. 12.65 × 8 =
  13. 13.30 × 8 =
  14. 14.154 × 4 =
  15. 15.46 × 4 =
  16. 16.86 × 4 =
  17. 17.32 × 8 =
  18. 18.99 × 4 =
  19. 19.15 × 4 =
  20. 20.121 × 4 =
  21. 21.44 × 8 =
  22. 22.36 × 8 =
  23. 23.32 × 8 =
  24. 24.55 × 4 =
  25. 25.68 × 8 =
  26. 26.43 × 8 =
  27. 27.63 × 8 =
  28. 28.14 × 8 =
  29. 29.25 × 8 =
  30. 30.37 × 4 =
  31. 31.28 × 8 =
  32. 32.16 × 8 =
  33. 33.44 × 4 =
  34. 34.50 × 4 =
  35. 35.22 × 4 =
  36. 36.58 × 8 =
  37. 37.13 × 4 =
  38. 38.158 × 4 =
  39. 39.42 × 4 =
  40. 40.141 × 4 =

Answer key

  1. 208
  2. 472
  3. 612
  4. 160
  5. 272
  6. 488
  7. 96
  8. 152
  9. 84
  10. 192
  11. 368
  12. 520
  13. 240
  14. 616
  15. 184
  16. 344
  17. 256
  18. 396
  19. 60
  20. 484
  21. 352
  22. 288
  23. 256
  24. 220
  25. 544
  26. 344
  27. 504
  28. 112
  29. 200
  30. 148
  31. 224
  32. 128
  33. 176
  34. 200
  35. 88
  36. 464
  37. 52
  38. 632
  39. 168
  40. 564

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