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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 704 · 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. 1.51 × 8 =
  2. 2.50 × 4 =
  3. 3.18 × 4 =
  4. 4.23 × 4 =
  5. 5.23 × 8 =
  6. 6.97 × 4 =
  7. 7.87 × 4 =
  8. 8.145 × 4 =
  9. 9.50 × 8 =
  10. 10.74 × 4 =
  11. 11.32 × 8 =
  12. 12.56 × 4 =
  13. 13.22 × 8 =
  14. 14.29 × 8 =
  15. 15.27 × 4 =
  16. 16.28 × 8 =
  17. 17.116 × 4 =
  18. 18.49 × 4 =
  19. 19.21 × 8 =
  20. 20.124 × 4 =
  21. 21.59 × 4 =
  22. 22.31 × 4 =
  23. 23.74 × 4 =
  24. 24.22 × 8 =
  25. 25.47 × 4 =
  26. 26.30 × 8 =
  27. 27.50 × 4 =
  28. 28.43 × 8 =
  29. 29.37 × 8 =
  30. 30.12 × 8 =
  31. 31.138 × 4 =
  32. 32.64 × 4 =
  33. 33.57 × 4 =
  34. 34.49 × 4 =
  35. 35.37 × 4 =
  36. 36.52 × 4 =
  37. 37.12 × 8 =
  38. 38.138 × 4 =
  39. 39.51 × 4 =
  40. 40.124 × 4 =

Answer key

  1. 408
  2. 200
  3. 72
  4. 92
  5. 184
  6. 388
  7. 348
  8. 580
  9. 400
  10. 296
  11. 256
  12. 224
  13. 176
  14. 232
  15. 108
  16. 224
  17. 464
  18. 196
  19. 168
  20. 496
  21. 236
  22. 124
  23. 296
  24. 176
  25. 188
  26. 240
  27. 200
  28. 344
  29. 296
  30. 96
  31. 552
  32. 256
  33. 228
  34. 196
  35. 148
  36. 208
  37. 96
  38. 552
  39. 204
  40. 496

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