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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 579 · 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. 1.38 × 8 =
  2. 2.29 × 8 =
  3. 3.23 × 4 =
  4. 4.64 × 8 =
  5. 5.148 × 4 =
  6. 6.82 × 4 =
  7. 7.21 × 8 =
  8. 8.126 × 4 =
  9. 9.23 × 8 =
  10. 10.112 × 4 =
  11. 11.57 × 4 =
  12. 12.59 × 8 =
  13. 13.151 × 4 =
  14. 14.22 × 8 =
  15. 15.84 × 4 =
  16. 16.27 × 8 =
  17. 17.40 × 8 =
  18. 18.36 × 8 =
  19. 19.66 × 8 =
  20. 20.20 × 4 =
  21. 21.107 × 4 =
  22. 22.46 × 4 =
  23. 23.43 × 8 =
  24. 24.18 × 8 =
  25. 25.58 × 4 =
  26. 26.52 × 8 =
  27. 27.79 × 4 =
  28. 28.23 × 4 =
  29. 29.18 × 4 =
  30. 30.35 × 4 =
  31. 31.68 × 8 =
  32. 32.14 × 4 =
  33. 33.142 × 4 =
  34. 34.28 × 8 =
  35. 35.18 × 4 =
  36. 36.60 × 8 =
  37. 37.31 × 8 =
  38. 38.31 × 4 =
  39. 39.15 × 8 =
  40. 40.58 × 4 =

Answer key

  1. 304
  2. 232
  3. 92
  4. 512
  5. 592
  6. 328
  7. 168
  8. 504
  9. 184
  10. 448
  11. 228
  12. 472
  13. 604
  14. 176
  15. 336
  16. 216
  17. 320
  18. 288
  19. 528
  20. 80
  21. 428
  22. 184
  23. 344
  24. 144
  25. 232
  26. 416
  27. 316
  28. 92
  29. 72
  30. 140
  31. 544
  32. 56
  33. 568
  34. 224
  35. 72
  36. 480
  37. 248
  38. 124
  39. 120
  40. 232

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