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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 469 · 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. 1.125 × 4 =
  2. 2.23 × 4 =
  3. 3.105 × 4 =
  4. 4.49 × 8 =
  5. 5.66 × 4 =
  6. 6.29 × 8 =
  7. 7.28 × 8 =
  8. 8.51 × 4 =
  9. 9.33 × 8 =
  10. 10.22 × 8 =
  11. 11.38 × 4 =
  12. 12.74 × 8 =
  13. 13.31 × 8 =
  14. 14.19 × 4 =
  15. 15.14 × 8 =
  16. 16.42 × 8 =
  17. 17.69 × 8 =
  18. 18.39 × 8 =
  19. 19.17 × 8 =
  20. 20.48 × 4 =
  21. 21.28 × 8 =
  22. 22.76 × 4 =
  23. 23.65 × 8 =
  24. 24.56 × 8 =
  25. 25.75 × 8 =
  26. 26.92 × 4 =
  27. 27.69 × 8 =
  28. 28.110 × 4 =
  29. 29.156 × 4 =
  30. 30.33 × 8 =
  31. 31.27 × 8 =
  32. 32.24 × 8 =
  33. 33.119 × 4 =
  34. 34.44 × 8 =
  35. 35.50 × 4 =
  36. 36.138 × 4 =
  37. 37.45 × 4 =
  38. 38.37 × 4 =
  39. 39.41 × 8 =
  40. 40.98 × 4 =

Answer key

  1. 500
  2. 92
  3. 420
  4. 392
  5. 264
  6. 232
  7. 224
  8. 204
  9. 264
  10. 176
  11. 152
  12. 592
  13. 248
  14. 76
  15. 112
  16. 336
  17. 552
  18. 312
  19. 136
  20. 192
  21. 224
  22. 304
  23. 520
  24. 448
  25. 600
  26. 368
  27. 552
  28. 440
  29. 624
  30. 264
  31. 216
  32. 192
  33. 476
  34. 352
  35. 200
  36. 552
  37. 180
  38. 148
  39. 328
  40. 392

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