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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 826 · 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. 1.69 × 4 =
  2. 2.153 × 4 =
  3. 3.32 × 4 =
  4. 4.13 × 4 =
  5. 5.39 × 8 =
  6. 6.30 × 4 =
  7. 7.62 × 8 =
  8. 8.85 × 4 =
  9. 9.42 × 8 =
  10. 10.31 × 4 =
  11. 11.159 × 4 =
  12. 12.60 × 8 =
  13. 13.145 × 4 =
  14. 14.27 × 8 =
  15. 15.31 × 4 =
  16. 16.17 × 4 =
  17. 17.129 × 4 =
  18. 18.63 × 4 =
  19. 19.19 × 8 =
  20. 20.53 × 8 =
  21. 21.144 × 4 =
  22. 22.19 × 8 =
  23. 23.47 × 4 =
  24. 24.98 × 4 =
  25. 25.71 × 8 =
  26. 26.54 × 4 =
  27. 27.15 × 4 =
  28. 28.132 × 4 =
  29. 29.43 × 8 =
  30. 30.15 × 8 =
  31. 31.15 × 4 =
  32. 32.50 × 4 =
  33. 33.64 × 8 =
  34. 34.23 × 4 =
  35. 35.53 × 4 =
  36. 36.18 × 8 =
  37. 37.72 × 4 =
  38. 38.26 × 4 =
  39. 39.132 × 4 =
  40. 40.30 × 8 =

Answer key

  1. 276
  2. 612
  3. 128
  4. 52
  5. 312
  6. 120
  7. 496
  8. 340
  9. 336
  10. 124
  11. 636
  12. 480
  13. 580
  14. 216
  15. 124
  16. 68
  17. 516
  18. 252
  19. 152
  20. 424
  21. 576
  22. 152
  23. 188
  24. 392
  25. 568
  26. 216
  27. 60
  28. 528
  29. 344
  30. 120
  31. 60
  32. 200
  33. 512
  34. 92
  35. 212
  36. 144
  37. 288
  38. 104
  39. 528
  40. 240

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