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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 48 · 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. 1.25 × 8 =
  2. 2.74 × 8 =
  3. 3.79 × 4 =
  4. 4.12 × 8 =
  5. 5.16 × 4 =
  6. 6.27 × 8 =
  7. 7.100 × 4 =
  8. 8.92 × 4 =
  9. 9.74 × 8 =
  10. 10.55 × 4 =
  11. 11.61 × 8 =
  12. 12.137 × 4 =
  13. 13.68 × 8 =
  14. 14.77 × 4 =
  15. 15.68 × 4 =
  16. 16.38 × 8 =
  17. 17.53 × 4 =
  18. 18.23 × 8 =
  19. 19.28 × 8 =
  20. 20.69 × 8 =
  21. 21.27 × 8 =
  22. 22.95 × 4 =
  23. 23.60 × 8 =
  24. 24.27 × 4 =
  25. 25.44 × 4 =
  26. 26.21 × 8 =
  27. 27.129 × 4 =
  28. 28.45 × 8 =
  29. 29.22 × 8 =
  30. 30.61 × 4 =
  31. 31.27 × 4 =
  32. 32.28 × 4 =
  33. 33.75 × 4 =
  34. 34.91 × 4 =
  35. 35.51 × 8 =
  36. 36.93 × 4 =
  37. 37.40 × 8 =
  38. 38.63 × 8 =
  39. 39.13 × 4 =
  40. 40.20 × 4 =

Answer key

  1. 200
  2. 592
  3. 316
  4. 96
  5. 64
  6. 216
  7. 400
  8. 368
  9. 592
  10. 220
  11. 488
  12. 548
  13. 544
  14. 308
  15. 272
  16. 304
  17. 212
  18. 184
  19. 224
  20. 552
  21. 216
  22. 380
  23. 480
  24. 108
  25. 176
  26. 168
  27. 516
  28. 360
  29. 176
  30. 244
  31. 108
  32. 112
  33. 300
  34. 364
  35. 408
  36. 372
  37. 320
  38. 504
  39. 52
  40. 80

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