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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 586 · 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. 1.39 × 8 =
  2. 2.57 × 8 =
  3. 3.22 × 8 =
  4. 4.15 × 8 =
  5. 5.52 × 8 =
  6. 6.49 × 4 =
  7. 7.27 × 8 =
  8. 8.23 × 4 =
  9. 9.114 × 4 =
  10. 10.100 × 4 =
  11. 11.104 × 4 =
  12. 12.127 × 4 =
  13. 13.85 × 4 =
  14. 14.46 × 8 =
  15. 15.18 × 4 =
  16. 16.21 × 8 =
  17. 17.78 × 4 =
  18. 18.20 × 8 =
  19. 19.45 × 4 =
  20. 20.33 × 8 =
  21. 21.61 × 4 =
  22. 22.54 × 8 =
  23. 23.57 × 4 =
  24. 24.53 × 8 =
  25. 25.50 × 8 =
  26. 26.19 × 8 =
  27. 27.44 × 8 =
  28. 28.14 × 8 =
  29. 29.113 × 4 =
  30. 30.65 × 8 =
  31. 31.19 × 8 =
  32. 32.83 × 4 =
  33. 33.150 × 4 =
  34. 34.16 × 8 =
  35. 35.118 × 4 =
  36. 36.43 × 8 =
  37. 37.18 × 4 =
  38. 38.26 × 8 =
  39. 39.43 × 8 =
  40. 40.47 × 4 =

Answer key

  1. 312
  2. 456
  3. 176
  4. 120
  5. 416
  6. 196
  7. 216
  8. 92
  9. 456
  10. 400
  11. 416
  12. 508
  13. 340
  14. 368
  15. 72
  16. 168
  17. 312
  18. 160
  19. 180
  20. 264
  21. 244
  22. 432
  23. 228
  24. 424
  25. 400
  26. 152
  27. 352
  28. 112
  29. 452
  30. 520
  31. 152
  32. 332
  33. 600
  34. 128
  35. 472
  36. 344
  37. 72
  38. 208
  39. 344
  40. 188

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