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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 141 · 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. 1.67 × 4 =
  2. 2.60 × 4 =
  3. 3.57 × 4 =
  4. 4.18 × 4 =
  5. 5.13 × 4 =
  6. 6.157 × 4 =
  7. 7.18 × 8 =
  8. 8.63 × 8 =
  9. 9.141 × 4 =
  10. 10.87 × 4 =
  11. 11.51 × 4 =
  12. 12.108 × 4 =
  13. 13.21 × 8 =
  14. 14.159 × 4 =
  15. 15.30 × 8 =
  16. 16.95 × 4 =
  17. 17.75 × 4 =
  18. 18.44 × 4 =
  19. 19.25 × 8 =
  20. 20.40 × 8 =
  21. 21.21 × 8 =
  22. 22.36 × 4 =
  23. 23.55 × 4 =
  24. 24.26 × 8 =
  25. 25.36 × 8 =
  26. 26.64 × 8 =
  27. 27.74 × 4 =
  28. 28.56 × 8 =
  29. 29.74 × 8 =
  30. 30.66 × 8 =
  31. 31.14 × 4 =
  32. 32.106 × 4 =
  33. 33.27 × 4 =
  34. 34.57 × 4 =
  35. 35.87 × 4 =
  36. 36.160 × 4 =
  37. 37.19 × 8 =
  38. 38.55 × 8 =
  39. 39.14 × 4 =
  40. 40.52 × 8 =

Answer key

  1. 268
  2. 240
  3. 228
  4. 72
  5. 52
  6. 628
  7. 144
  8. 504
  9. 564
  10. 348
  11. 204
  12. 432
  13. 168
  14. 636
  15. 240
  16. 380
  17. 300
  18. 176
  19. 200
  20. 320
  21. 168
  22. 144
  23. 220
  24. 208
  25. 288
  26. 512
  27. 296
  28. 448
  29. 592
  30. 528
  31. 56
  32. 424
  33. 108
  34. 228
  35. 348
  36. 640
  37. 152
  38. 440
  39. 56
  40. 416

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