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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 127 · 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. 1.19 × 4 =
  2. 2.20 × 8 =
  3. 3.20 × 4 =
  4. 4.85 × 4 =
  5. 5.55 × 8 =
  6. 6.59 × 8 =
  7. 7.89 × 4 =
  8. 8.17 × 8 =
  9. 9.23 × 4 =
  10. 10.19 × 8 =
  11. 11.15 × 4 =
  12. 12.54 × 4 =
  13. 13.49 × 4 =
  14. 14.124 × 4 =
  15. 15.85 × 4 =
  16. 16.21 × 4 =
  17. 17.142 × 4 =
  18. 18.37 × 8 =
  19. 19.64 × 4 =
  20. 20.47 × 4 =
  21. 21.22 × 8 =
  22. 22.122 × 4 =
  23. 23.137 × 4 =
  24. 24.42 × 8 =
  25. 25.18 × 8 =
  26. 26.49 × 4 =
  27. 27.20 × 8 =
  28. 28.97 × 4 =
  29. 29.57 × 8 =
  30. 30.47 × 8 =
  31. 31.98 × 4 =
  32. 32.36 × 4 =
  33. 33.50 × 8 =
  34. 34.27 × 8 =
  35. 35.29 × 8 =
  36. 36.56 × 4 =
  37. 37.32 × 8 =
  38. 38.21 × 8 =
  39. 39.48 × 4 =
  40. 40.28 × 8 =

Answer key

  1. 76
  2. 160
  3. 80
  4. 340
  5. 440
  6. 472
  7. 356
  8. 136
  9. 92
  10. 152
  11. 60
  12. 216
  13. 196
  14. 496
  15. 340
  16. 84
  17. 568
  18. 296
  19. 256
  20. 188
  21. 176
  22. 488
  23. 548
  24. 336
  25. 144
  26. 196
  27. 160
  28. 388
  29. 456
  30. 376
  31. 392
  32. 144
  33. 400
  34. 216
  35. 232
  36. 224
  37. 256
  38. 168
  39. 192
  40. 224

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