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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 358 · 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. 1.73 × 4 =
  2. 2.37 × 8 =
  3. 3.18 × 8 =
  4. 4.19 × 4 =
  5. 5.129 × 4 =
  6. 6.104 × 4 =
  7. 7.15 × 4 =
  8. 8.73 × 8 =
  9. 9.29 × 4 =
  10. 10.48 × 8 =
  11. 11.44 × 8 =
  12. 12.59 × 4 =
  13. 13.26 × 8 =
  14. 14.102 × 4 =
  15. 15.73 × 4 =
  16. 16.65 × 4 =
  17. 17.74 × 8 =
  18. 18.77 × 4 =
  19. 19.30 × 8 =
  20. 20.75 × 8 =
  21. 21.110 × 4 =
  22. 22.20 × 4 =
  23. 23.64 × 8 =
  24. 24.121 × 4 =
  25. 25.46 × 8 =
  26. 26.61 × 4 =
  27. 27.74 × 8 =
  28. 28.154 × 4 =
  29. 29.13 × 8 =
  30. 30.20 × 8 =
  31. 31.40 × 4 =
  32. 32.70 × 4 =
  33. 33.88 × 4 =
  34. 34.24 × 4 =
  35. 35.75 × 8 =
  36. 36.154 × 4 =
  37. 37.13 × 8 =
  38. 38.12 × 8 =
  39. 39.79 × 4 =
  40. 40.34 × 8 =

Answer key

  1. 292
  2. 296
  3. 144
  4. 76
  5. 516
  6. 416
  7. 60
  8. 584
  9. 116
  10. 384
  11. 352
  12. 236
  13. 208
  14. 408
  15. 292
  16. 260
  17. 592
  18. 308
  19. 240
  20. 600
  21. 440
  22. 80
  23. 512
  24. 484
  25. 368
  26. 244
  27. 592
  28. 616
  29. 104
  30. 160
  31. 160
  32. 280
  33. 352
  34. 96
  35. 600
  36. 616
  37. 104
  38. 96
  39. 316
  40. 272

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