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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 54 · 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. 1.50 × 4 =
  2. 2.64 × 8 =
  3. 3.102 × 4 =
  4. 4.79 × 4 =
  5. 5.48 × 8 =
  6. 6.65 × 4 =
  7. 7.15 × 8 =
  8. 8.32 × 4 =
  9. 9.133 × 4 =
  10. 10.16 × 8 =
  11. 11.45 × 4 =
  12. 12.28 × 8 =
  13. 13.70 × 4 =
  14. 14.56 × 8 =
  15. 15.17 × 8 =
  16. 16.23 × 8 =
  17. 17.149 × 4 =
  18. 18.62 × 8 =
  19. 19.38 × 4 =
  20. 20.61 × 8 =
  21. 21.33 × 4 =
  22. 22.52 × 4 =
  23. 23.52 × 8 =
  24. 24.50 × 8 =
  25. 25.18 × 8 =
  26. 26.144 × 4 =
  27. 27.154 × 4 =
  28. 28.35 × 4 =
  29. 29.33 × 8 =
  30. 30.27 × 8 =
  31. 31.93 × 4 =
  32. 32.31 × 4 =
  33. 33.82 × 4 =
  34. 34.154 × 4 =
  35. 35.125 × 4 =
  36. 36.41 × 4 =
  37. 37.31 × 4 =
  38. 38.45 × 8 =
  39. 39.41 × 4 =
  40. 40.22 × 4 =

Answer key

  1. 200
  2. 512
  3. 408
  4. 316
  5. 384
  6. 260
  7. 120
  8. 128
  9. 532
  10. 128
  11. 180
  12. 224
  13. 280
  14. 448
  15. 136
  16. 184
  17. 596
  18. 496
  19. 152
  20. 488
  21. 132
  22. 208
  23. 416
  24. 400
  25. 144
  26. 576
  27. 616
  28. 140
  29. 264
  30. 216
  31. 372
  32. 124
  33. 328
  34. 616
  35. 500
  36. 164
  37. 124
  38. 360
  39. 164
  40. 88

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